removed unused imports from chessmove.rs

Engine/movebuffer

.github/workflows/upload_data.yml

@@ -20,7 +20,7 @@ jobs:
           echo "$GOOGLE_SERVICE_ACCOUNT_JSON" > service_account.json
           
           python <<'PYCODE'
-          import gspread, json, subprocess
+          import gspread, json, subprocess, time
 
           creds = json.load(open("service_account.json"))
           gc = gspread.service_account_from_dict(creds)
@@ -38,6 +38,7 @@ jobs:
 
               for i, row in enumerate(rows_to_append):
                   worksheet.insert_row(row, start_row + i)
+                  time.sleep(1)
 
 
           with open(f"{v}/test_data.log", "r") as f:

Docs/kovspec.md

@@ -22,6 +22,68 @@ A vágyálom rendszer alapját egy központi szerver képezné, amely kezeli a f
 A platform célja a megbízható és folyamatos működés, akár nagyobb terhelés mellett is. A rendszer fejlesztése során kiemelt szempont lenne a biztonság (adatvédelem, csalás elleni védelem), a stabil hálózati kommunikáció, valamint a bővíthetőség – például ranglisták, versenyek vagy mobilalkalmazás későbbi integrálásának lehetősége.
 
 Összességében a vágyálom rendszer egy minden szempontból teljes értékű, közösségorientált sakkalkalmazás lenne, amely a mostani, helyi hálózaton működő változatból fejlődne tovább egy interneten keresztül bárhonnan elérhető platformmá.
+
+## 3. Igényelt funkciók
+
+### Alapok
+- Két játékos közti sakkjátszma lebonyolítása.
+- Teljes szabályrendszer megvalósítása (érvényes lépések, sakk/sakkmatt/patt felismerése).
+- Új játék indítása.
+- Játékosok nevének megadása a játszma elején.
+- Felhasználóbarát grafikus felület (UI) – látható tábla, figurák, órák, státuszjelzések.
+- Játékoslépések vizuális kiemelése (pl. kijelölt mező, lehetséges lépések megjelenítése).
+- A játék állapotának kijelzése (folyamatban, sakk, matt, döntetlen).
+  
+### LAN és hálózati funkciók
+- „Szerver indítása” funkció – a játékos hostként indíthat egy helyi szervert.
+- „Csatlakozás” funkció – másik játékos IP-cím alapján tud csatlakozni.
+- Helyi hálózaton keresztüli valós idejű kommunikáció.
+- LAN játék automatikus felfedezése (broadcast keresés).
+- Játék mentése és visszatöltése hálózati módban.
+
+### Online vágyálom funkciók
+- Felhasználói regisztráció és bejelentkezés.
+- Jelszóval védett fiókok, email- vagy OAuth-alapú hitelesítés (Google, GitHub stb.).
+- Profiloldal megtekintése (név, avatar, statisztikák, értékszám).
+- Automatikus matchmaking rendszer.
+- Kézi játékindítás – meghívó küldése barátnak.
+- Játszmák mentése és visszajátszása.
+- Játszmaelemzés – lépések listázása, hibák kiemelése.
+- Webes felület vagy mobilalkalmazás támogatása.
+- Játék előzményeinek és statisztikáinak megtekintése (győzelmek, vereségek, döntetlenek).
+- Automatikus szervermentés és adatbázis szinkronizáció.
+
+### Felhasználói felület
+- Letisztult, reszponzív, platformfüggetlen felület (asztali és webes verzió).
+- Sötét/világos téma lehetősége.
+- Egyéni figurakészlet vagy tábla kinézet választása.
+- Animált figuramozgások.
+- Egérrel és billentyűzettel is vezérelhető játék.
+- Hangjelzések a lépésekhez és az idő lejártához.
+- Lépéselőzmények (move list) megjelenítése oldalt.
+- Tábla forgatásának lehetősége (pl. a fehér vagy fekete nézőpontból).
+- Állapotjelzők (sakk, matt, döntetlen, várakozás az ellenfélre).
+- Teljes képernyős mód.
+
+### Technikai / fejlesztői funkciók
+- Kliens–szerver architektúra.
+- REST API vagy WebSocket alapú kommunikáció.
+- Adatbázis a felhasználói adatok és meccsek tárolására (pl. SQLite, PostgreSQL, MongoDB).
+- Logolási és hibakezelési rendszer.
+- Automatikus mentés és adatvisszaállítás.
+- Verziókezelés (Git).
+- Tesztelhető, moduláris kódszerkezet (külön modulok: logika, UI, hálózat, adat).
+- Cross-platform működés (Windows, Linux, esetleg web).
+
+### További funkciók
+- Egyszemélyes mód (ember vs. gép, AI-bot).
+- Több nehézségi szintű AI.
+- Oktató mód (javasolt lépések, hibák magyarázata).
+- Hivatalos FEN/PGN formátum export/import.
+- Beépített sakkfeladványok, kihívások.
+- Érintéses vezérlés mobilon.
+- Többnyelvű felület (pl. magyar, angol).
+
 ## 4. Rendszer követelmények
 
 A rendszer célja egy kétjátékos sakkalkalmazás megvalósítása, amely alapvetően hálózati kapcsolat (LAN vagy internet) segítségével biztosítja a valós idejű játékot. A rendszer kliens–szerver architektúrán alapul, ahol az egyes komponensek jól elkülönülten, meghatározott feladatokat látnak el.

engine/Cargo.toml

@@ -4,4 +4,6 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
-once_cell = "1.19"
+once_cell = "1.19"
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"

engine/src/bitboard.rs

@@ -1,2 +1,10 @@
 mod attackmaps;
-mod utils;
+mod utils;
+mod legality;
+mod checkinfo;
+mod attacks;
+mod movebuffer;
+mod movegen;
+
+pub mod board;
+pub(in super) mod bitmove;

engine/src/bitboard/attackmaps.rs

@@ -94,6 +94,64 @@ pub static RAY_TABLE: Lazy<[[u64; 8]; 64]> = Lazy::new(|| {
   return table;
 });
 
+// ROOK_MOVE_MASK[<square_index>]
+pub static ROOK_MOVE_MASK: Lazy<[u64; 64]> = Lazy::new(|| {
+  let mut table = [0u64; 64];
+
+  for sq in 0..64 {
+    for dir in [0, 2, 4, 6] {
+      table[sq] |= RAY_TABLE[sq][dir];
+    }
+  }
+  table
+});
+
+// BISHOP_MOVE_MASK[<square_index>]
+pub static BISHOP_MOVE_MASK: Lazy<[u64; 64]> = Lazy::new(|| {
+  let mut table = [0u64; 64];
+
+  for sq in 0..64 {
+    for dir in [1, 3, 5, 7] {
+      table[sq] |= RAY_TABLE[sq][dir];
+    }
+  }
+  table
+});
+
+// KING_SAFETY_ROOK_MASK[<square_index>]
+pub static KING_SAFETY_ROOK_MASK: Lazy<[u64; 64]> = Lazy::new(|| {
+  let mut table = [0u64; 64];
+
+  for sq in 0..64 {
+    let mut mask = KING_ATTACK_MAP[sq];
+
+    while mask != 0 {
+      let next_sq = mask.trailing_zeros();
+      table[sq] |= ROOK_MOVE_MASK[next_sq as usize];
+      mask &= !(1 << next_sq);
+    }
+  }
+
+  table
+});
+
+// KING_SAFETY_BISHOP_MASK[<square_index>]
+pub static KING_SAFETY_BISHOP_MASK: Lazy<[u64; 64]> = Lazy::new(|| {
+  let mut table = [0u64; 64];
+
+  for sq in 0..64 {
+    let mut mask = KING_ATTACK_MAP[sq];
+
+    while mask != 0 {
+      let next_sq = mask.trailing_zeros();
+      table[sq] |= BISHOP_MOVE_MASK[next_sq as usize];
+      mask &= !(1 << next_sq);
+    }
+  }
+
+  table
+});
+
 
 
 // <----- TESTS ----->

engine/src/bitboard/attacks.rs

@@ -0,0 +1,196 @@
+use super::board::Board;
+use super::attackmaps::*;
+
+impl Board {
+
+  const RANK_2: u64 = 0x0000_0000_0000_FF00;
+  const RANK_7: u64 = 0x00FF_0000_0000_0000;
+  const A_FILE: u64 = 0x0101_0101_0101_0101;
+  const H_FILE: u64 = 0x8080_8080_8080_8080;
+
+  pub fn get_pseudo_pawn_moves(&self, sq: u32) -> u64 {
+    let pawn: u64 = 1 << sq;
+    let mut move_mask: u64 = 0u64;
+    let move_offset: i8 = 8 - 16 * self.side_to_move as i8;
+
+    let next_sq: u64 = if move_offset > 0 {pawn << move_offset} else {pawn >> -move_offset};
+    if (self.occupancy[2] & next_sq) == 0 {
+      move_mask |= next_sq;
+
+      if (self.side_to_move == 0 && pawn & Self::RANK_2 != 0)
+        || (self.side_to_move == 1 && pawn & Self::RANK_7 != 0) {
+
+        let next_sq: u64 = if move_offset > 0 {next_sq << move_offset} else {next_sq >> -move_offset};
+        if (self.occupancy[2] & next_sq) == 0 {
+          move_mask |= next_sq;
+        }
+      }
+    }
+
+    return move_mask;
+  }
+  #[inline]
+  pub fn get_pseudo_knight_moves(&self, sq: u32) -> u64 {
+    return KNIGHT_ATTACK_MAP[sq as usize];
+  }
+  #[inline]
+  pub fn get_pseudo_king_moves(&self, sq: u32) -> u64 {
+    return KING_ATTACK_MAP[sq as usize];
+  }
+  #[inline]
+  pub fn get_pseudo_pawn_captures(&self, sq: u32) -> u64 {
+    return PAWN_ATTACK_MAP[sq as usize][self.side_to_move as usize];
+  }
+  #[inline]
+  pub fn get_pseudo_opponent_pawn_captures(&self, sq: u32) -> u64 {
+    return PAWN_ATTACK_MAP[sq as usize][1 - self.side_to_move as usize];
+  }
+  #[inline]
+  pub fn get_pseudo_bishop_moves(&self, sq: u32) -> u64 {
+    let mut  moves = 0u64;
+    let sq  = sq as usize;
+    let occupancy = self.occupancy[2];
+    moves |= get_raycast_from_square_in_direction(occupancy, sq, 1);
+    moves |= get_raycast_from_square_in_direction(occupancy, sq, 3);
+    moves |= get_raycast_from_square_in_direction(occupancy, sq, 5);
+    moves |= get_raycast_from_square_in_direction(occupancy, sq, 7);
+
+    return moves;
+  }
+  #[inline]
+  pub fn get_pseudo_rook_moves(&self, sq: u32) -> u64 {
+    let mut moves: u64 = 0u64;
+    let occupancy = self.occupancy[2];
+    let sq = sq as usize;
+    moves |= get_raycast_from_square_in_direction(occupancy, sq, 0);
+    moves |= get_raycast_from_square_in_direction(occupancy, sq, 2);
+    moves |= get_raycast_from_square_in_direction(occupancy, sq, 4);
+    moves |= get_raycast_from_square_in_direction(occupancy, sq, 6);
+
+    return moves;
+  }
+  #[inline(always)]
+  pub fn get_pseudo_queen_moves(&self, sq: u32) -> u64 {
+    return self.get_pseudo_bishop_moves(sq) | self.get_pseudo_rook_moves(sq);
+  }
+
+  #[inline]
+  pub fn get_pseudo_bishop_moves_ignore_king(&self, sq: u32) -> u64 {
+    let mut  moves = 0u64;
+    let sq  = sq as usize;
+    let king = self.bitboards[5 + 6*self.side_to_move as usize];
+    let occupancy = self.occupancy[2] & !king;
+    moves |= get_raycast_from_square_in_direction(occupancy, sq, 1);
+    moves |= get_raycast_from_square_in_direction(occupancy, sq, 3);
+    moves |= get_raycast_from_square_in_direction(occupancy, sq, 5);
+    moves |= get_raycast_from_square_in_direction(occupancy, sq, 7);
+
+    return moves;
+  }
+  #[inline]
+  pub fn get_pseudo_rook_moves_ignore_king(&self, sq: u32) -> u64 {
+    let mut moves: u64 = 0u64;
+    let sq = sq as usize;
+    let king = self.bitboards[5 + 6*self.side_to_move as usize];
+    let occupancy = self.occupancy[2] & !king;
+    moves |= get_raycast_from_square_in_direction(occupancy, sq, 0);
+    moves |= get_raycast_from_square_in_direction(occupancy, sq, 2);
+    moves |= get_raycast_from_square_in_direction(occupancy, sq, 4);
+    moves |= get_raycast_from_square_in_direction(occupancy, sq, 6);
+
+    return moves;
+  }
+
+  #[inline]
+  pub fn is_square_attacked(&self, king_sq: u32) -> bool {
+    let offset: usize = 6 * self.side_to_move as usize;
+
+    // rook-queen checks (+)
+    let mut threat_mask: u64 = self.get_pseudo_rook_moves(king_sq);
+    let mut attacker_mask: u64 = self.bitboards[10 - offset] | self.bitboards[9 - offset];
+    if threat_mask & attacker_mask != 0 { return true; }
+
+    // bishop-queen checks (x)
+    threat_mask = self.get_pseudo_bishop_moves(king_sq);
+    attacker_mask = self.bitboards[10 - offset] | self.bitboards[8 - offset];
+    if threat_mask & attacker_mask != 0 { return true; }
+
+    // knight checks (L)
+    threat_mask = KNIGHT_ATTACK_MAP[king_sq as usize];
+    attacker_mask = self.bitboards[7 - offset];
+    if threat_mask & attacker_mask != 0 { return true; }
+
+    // pawn checks (v)
+    threat_mask = PAWN_ATTACK_MAP[king_sq as usize][self.side_to_move as usize];
+    attacker_mask = self.bitboards[6 - offset];
+    return threat_mask & attacker_mask != 0;
+  }
+  pub fn get_safe_king_squares(&self) -> u64 {
+    let offset: usize = 6 * (1 - self.side_to_move as usize);
+    let king_sq = self.bitboards[11 - offset].trailing_zeros() as usize;
+    let bishop_mask = KING_SAFETY_BISHOP_MASK[king_sq];
+    let rook_mask = KING_SAFETY_ROOK_MASK[king_sq];
+    let mut attack_map: u64 = 0u64;
+
+    let mut board: u64 = self.bitboards[offset];
+    if self.side_to_move() == 0 {
+      attack_map |= (board >> 9 & !Self::H_FILE) | (board >> 7 & !Self::A_FILE);
+    }
+    else {
+      attack_map |= (board << 9 & !Self::A_FILE) | (board << 7 & !Self::H_FILE);
+    }
+
+    board = self.bitboards[offset + 1];
+    while board != 0 {
+      let piece_sq: u32 = board.trailing_zeros();
+      board &= !(1 << piece_sq);
+
+      attack_map |= self.get_pseudo_knight_moves(piece_sq);
+    }
+
+    board = self.bitboards[offset + 2] & bishop_mask;
+    while board != 0 {
+      let piece_sq: u32 = board.trailing_zeros();
+      board &= !(1 << piece_sq);
+
+      attack_map |= self.get_pseudo_bishop_moves_ignore_king(piece_sq);
+    }
+
+    board = self.bitboards[offset + 3] & rook_mask;
+    while board != 0 {
+      let piece_sq: u32 = board.trailing_zeros();
+      board &= !(1 << piece_sq);
+
+      attack_map |= self.get_pseudo_rook_moves_ignore_king(piece_sq);
+    }
+
+    board = self.bitboards[offset + 4] & (bishop_mask | rook_mask);
+    while board != 0 {
+      let piece_sq: u32 = board.trailing_zeros();
+      board &= !(1 << piece_sq);
+
+      attack_map |= self.get_pseudo_rook_moves_ignore_king(piece_sq) | self.get_pseudo_bishop_moves_ignore_king(piece_sq);
+    }
+
+    board = self.bitboards[offset + 5];
+    let piece_sq: u32 = board.trailing_zeros();
+    attack_map |= self.get_pseudo_king_moves(piece_sq);
+
+    return !attack_map;
+  }
+}
+
+#[inline(always)]
+pub fn get_raycast_from_square_in_direction(occupancy: u64, sq: usize, dir: usize) -> u64 {
+  let is_up: bool = dir / 4 == 0;
+  let mut ray: u64 = RAY_TABLE[sq][dir];
+  let blockers: u64 = occupancy & ray;
+
+  if blockers != 0 {
+    let first_blocker: u32 = if is_up { blockers.trailing_zeros() } else { 63 - blockers.leading_zeros() };
+
+    ray &= !RAY_TABLE[first_blocker as usize][dir];
+  }
+
+  return ray;
+}

engine/src/bitboard/bitmove.rs

@@ -0,0 +1,77 @@
+use super::utils::*;
+
+#[derive(Copy, Clone, PartialEq, Eq)]
+pub struct BitMove {
+
+  move_type: BitMoveType,
+  from_square: u8,
+  to_square: u8,
+  promotion_piece: Option<u8>
+}
+
+impl BitMove {
+
+  #[inline]
+  pub fn quiet(from: u8, to: u8, promotion_piece: Option<u8>) -> Self {
+    return Self {
+      move_type: BitMoveType::Quiet,
+      from_square: from,
+      to_square: to,
+      promotion_piece: promotion_piece
+    };
+  }
+  #[inline]
+  pub fn capture(from: u8, to: u8, promotion_piece: Option<u8>) -> Self {
+    return Self {
+      move_type: BitMoveType::Capture,
+      from_square: from,
+      to_square: to,
+      promotion_piece: promotion_piece
+    };
+  }
+  #[inline]
+  pub fn castle(from: u8, to: u8) -> Self {
+    return Self {
+      move_type: BitMoveType::Castle,
+      from_square: from,
+      to_square: to,
+      promotion_piece: None
+    };
+  }
+
+  #[inline(always)]
+  pub fn move_type(&self) -> BitMoveType {
+    return self.move_type;
+  }
+  #[inline(always)]
+  pub fn from_square(&self) -> u8 {
+    return self.from_square;
+  }
+  #[inline(always)]
+  pub fn to_square(&self) -> u8 {
+    return self.to_square;
+  }
+  #[inline(always)]
+  pub fn promotion_piece(&self) -> Option<u8> {
+    return self.promotion_piece;
+  }
+
+  pub fn uci_notation(&self) -> String {
+    let mut notation = notation_from_square_number(self.from_square());
+    notation.push_str(&notation_from_square_number(self.to_square()));
+
+    if let Some(promotion_piece) = self.promotion_piece {
+      notation.push(get_character_by_piece_id(promotion_piece).to_ascii_lowercase());
+    }
+
+    return notation;
+  }
+}
+
+#[derive(Copy, Clone, PartialEq, Eq)]
+pub enum BitMoveType {
+  Quiet,
+  Capture,
+  Castle,
+  EnPassant
+}

engine/src/bitboard/board.rs

@@ -0,0 +1,199 @@
+use super::utils::try_get_square_number_from_notation;
+
+pub struct Board {
+  pub(in super) bitboards: [u64; 12],     // 0-5 -> white pieces (P, N, B, R, Q, K), 6-11 -> black pieces (p, n, b, r, q, k)
+  pub(in super) piece_board: [u8; 64],    // same as board indexes, 12 -> empty square
+  pub(in super) occupancy: [u64; 3],      // 0 -> white, 1 -> black, 2 -> combined
+  pub(in super) castling_rights: u8,      // 0b0000_KQkq
+  pub(in super) pinned_squares: [u8; 64], // 0 -> E-W, 1 -> NE-SW, 2 -> N-S, 3 -> SE-NW, 4 -> no pin
+  pub(in super) pin_mask: u64,            // 1 -> pin, 0 -> no pin
+  pub(in super) en_passant_square: u64,   // 1 -> ep square, 0 -> no ep square
+  pub(in super) side_to_move: u8          // 0 -> white to play, 1 -> black to play
+}
+
+impl Board {
+
+  pub fn new_clear() -> Self {
+    let mut bit_board: Self = Self {
+      bitboards: [0x0000_0000_0000_0000; 12],
+      piece_board: [12; 64],
+      occupancy: [0x0000_0000_0000_0000; 3],
+      castling_rights: 0b0000_0000,
+      pinned_squares: [4; 64],
+      pin_mask: 0u64,
+      en_passant_square: 0x0000_0000_0000_0000,
+      side_to_move: 0
+    };
+
+    return bit_board;
+  }
+  pub fn new() -> Self {
+    let mut bit_board: Board = Self {
+      bitboards: [0x0000_0000_0000_FF00,
+                0x0000_0000_0000_0042,
+                0x0000_0000_0000_0024,
+                0x0000_0000_0000_0081,
+                0x0000_0000_0000_0008,
+                0x0000_0000_0000_0010,
+                0x00FF_0000_0000_0000,
+                0x4200_0000_0000_0000,
+                0x2400_0000_0000_0000,
+                0x8100_0000_0000_0000,
+                0x0800_0000_0000_0000,
+                0x1000_0000_0000_0000],
+      piece_board: [12; 64],
+      occupancy: [0; 3],
+      castling_rights: 0b0000_1111,
+      pinned_squares: [4; 64],
+      pin_mask: 0u64,
+      en_passant_square: 0x0000_0000_0000_0000,
+      side_to_move: 0
+    };
+    bit_board.calc_occupancy();
+    bit_board.calc_piece_board();
+
+    return bit_board;
+  }
+  pub fn build(fen: &str) -> Self {
+    let mut board: Board = Board::new_clear();
+
+    let mut col: i32 = 0;
+    let mut row: i32 = 7;
+    let pieces: [char; 12] = ['p', 'n', 'b', 'r', 'q', 'k', 'P', 'N', 'B', 'R', 'Q', 'K'];
+    let mut coming_up: &str = fen;
+
+    for (i, c) in coming_up.chars().enumerate() {
+      if pieces.contains(&c) {
+        board.place_piece(row*8 + col, c);
+        col += 1;
+      }
+      else if ('1'..='8').contains(&c) {
+        col += c.to_string().parse::<i32>().unwrap();
+      }
+      else if c == '/' {
+        row -= 1;
+        col = 0;
+      }
+      else {
+        coming_up = &coming_up[i+1..];
+        break;
+      }
+    }
+    board.calc_occupancy();
+    
+    match coming_up.chars().next().unwrap() {
+      'w' => board.side_to_move = 0,
+      'b' => board.side_to_move = 1,
+       _  => panic!("invalid fen notation / to be handled later")
+    }
+    coming_up = &coming_up[2..];
+
+    for (i, c) in coming_up.chars().enumerate() {
+      match c {
+        'K' => board.castling_rights |= 1 << 3,
+        'Q' => board.castling_rights |= 1 << 2,
+        'k' => board.castling_rights |= 1 << 1,
+        'q' => board.castling_rights |= 1,
+        '-' => {
+          coming_up = &coming_up[i+2..];
+          break;
+        }
+         _  => {
+          coming_up = &coming_up[i+1..];
+          break;
+        }
+      }
+    }
+    match coming_up.chars().next().unwrap() {
+      '-' => {
+          coming_up = &coming_up[1..];
+        }
+       _  => {
+          let notation = coming_up.split(' ').next().unwrap();
+          if let Ok(epsq_index) = try_get_square_number_from_notation(notation) {
+            board.en_passant_square = 1 << epsq_index;
+          }
+       }
+    }
+    board.calc_pinned_squares();
+    board.calc_piece_board();
+
+    return board;
+  }
+
+  #[inline(always)]
+  pub fn bitboards(&self, index: usize) -> u64 {
+    return self.bitboards[index];
+  }
+  #[inline(always)]
+  pub fn piece_board(&self, sq: u8) -> u8 {
+    return self.piece_board[sq as usize];
+  }
+  #[inline(always)]
+  pub fn occupancy(&self, side: usize) -> u64 {
+    return self.occupancy[side];
+  }
+  #[inline(always)]
+  pub fn castling_rights(&self) -> u8 {
+    return self.castling_rights;
+  }
+  #[inline(always)]
+  pub fn pinned_squares(&self, sq: usize) -> u8 {
+    return self.pinned_squares[sq];
+  }
+  #[inline(always)]
+  pub fn pin_mask(&self) -> u64 {
+    return self.pin_mask;
+  }
+  #[inline(always)]
+  pub fn en_passant_square(&self) -> u64 {
+    return self.en_passant_square;
+  }
+  #[inline(always)]
+  pub fn side_to_move(&self) -> u8 {
+    return self.side_to_move;
+  }
+
+  #[inline(always)]
+  pub fn current_king_square(&self) -> u32 {
+    return if self.side_to_move == 0 { self.bitboards[5].trailing_zeros() } else { self.bitboards[11].trailing_zeros() };
+  }
+
+  fn calc_occupancy(&mut self) {
+    self.occupancy = [0u64; 3];
+    for b in 0..6 {
+      self.occupancy[0] |= self.bitboards[b];
+    }
+    for b in 6..12 {
+      self.occupancy[1] |= self.bitboards[b];
+    }
+    self.occupancy[2] = self.occupancy[0] | self.occupancy[1];
+  }
+  fn calc_piece_board(&mut self) {
+    for sq in 0..64 {
+      for b in 0..12 {
+        if (self.bitboards[b as usize] & 1 << sq) != 0 {
+          self.piece_board[sq] = b;
+        }
+      }
+    }
+  }
+
+  pub fn place_piece(&mut self, sq: i32, piece: char) {
+    match piece {
+      'p' => {self.bitboards[6] |= 1 << sq}
+      'n' => {self.bitboards[7] |= 1 << sq}
+      'b' => {self.bitboards[8] |= 1 << sq}
+      'r' => {self.bitboards[9] |= 1 << sq}
+      'q' => {self.bitboards[10] |= 1 << sq}
+      'k' => {self.bitboards[11] |= 1 << sq}
+      'P' => {self.bitboards[0] |= 1 << sq}
+      'N' => {self.bitboards[1] |= 1 << sq}
+      'B' => {self.bitboards[2] |= 1 << sq}
+      'R' => {self.bitboards[3] |= 1 << sq}
+      'Q' => {self.bitboards[4] |= 1 << sq}
+      'K' => {self.bitboards[5] |= 1 << sq}
+       _  => ()
+    }
+  }
+}

engine/src/bitboard/checkinfo.rs

@@ -0,0 +1,21 @@
+
+pub struct CheckInfo {
+  pub check_count: u8,
+  pub move_mask: u64
+}
+
+impl CheckInfo {
+
+  pub fn new() -> Self {
+    return Self {
+      check_count: 0,
+      move_mask: 0xFFFF_FFFF_FFFF_FFFF
+    }
+  }
+
+  #[inline(always)]
+  pub fn add_checker(&mut self, move_mask: u64) {
+    self.move_mask &= move_mask;
+    self.check_count += 1;
+  }
+}

engine/src/bitboard/legality.rs

@@ -0,0 +1,134 @@
+use super::board::Board;
+use super::attackmaps::RAY_TABLE;
+use super::checkinfo::CheckInfo;
+use super::attacks::get_raycast_from_square_in_direction;
+
+impl Board {
+
+  pub fn check_test(&self) -> CheckInfo {
+    let mut check_info: CheckInfo = CheckInfo::new();
+    let offset: usize = 6 * self.side_to_move as usize;
+    let king: u64 = self.bitboards[5 + offset];
+    let king_sq = king.trailing_zeros() as usize;
+    let occupancy = self.occupancy[2];
+
+    // queen-rook checks (+)
+    let attacker_mask = self.bitboards[10 - offset] | self.bitboards[9 - offset];
+
+    for dir in [0, 2, 4, 6] {
+      let threat_mask: u64 = get_raycast_from_square_in_direction(occupancy, king_sq, dir);
+      if threat_mask & attacker_mask != 0 {
+        check_info.add_checker(threat_mask);
+      }
+    }
+
+    // queen-bishop checks (x)
+    let attacker_mask = self.bitboards[10 - offset] | self.bitboards[8 - offset];
+
+    for dir in [1, 3, 5, 7] {
+      let threat_mask = get_raycast_from_square_in_direction(occupancy, king_sq, dir);
+      if threat_mask & attacker_mask != 0 {
+        check_info.add_checker(threat_mask);
+      }
+    }
+
+    // knight checks (L)
+    let attacker_mask = self.bitboards[7 - offset];
+    let threat_mask = self.get_pseudo_knight_moves(king_sq as u32);
+    let checker = threat_mask & attacker_mask;
+    if checker != 0 {
+      check_info.add_checker(checker);
+    }
+
+    // pawn checks (v)
+    let attacker_mask = self.bitboards[6 - offset];
+    let threat_mask = self.get_pseudo_pawn_captures(king_sq as u32);
+    let checker = threat_mask & attacker_mask;
+    if checker != 0 {
+      check_info.add_checker(checker);
+    }
+
+    return check_info;
+  }
+
+  pub(in super) fn calc_pinned_squares(&mut self) {
+    self.pinned_squares = [4; 64];
+    self.pin_mask = 0u64;
+
+    let friendly_pieces: u64 = self.occupancy[self.side_to_move as usize];
+    let offset: usize = 6 * self.side_to_move as usize;
+    let king_board: u64 = self.bitboards[5 + offset];
+    let king_sq: u32 = king_board.trailing_zeros();
+    let opponent_queen_bishop_mask: u64 = self.bitboards[8 - offset] | self.bitboards[10 - offset];
+    let opponent_queen_rook_mask: u64 = self.bitboards[9 - offset] | self.bitboards[10 - offset];
+
+    // Queen-Rook directions
+    self.set_pinned_in_ray_direction(king_sq, friendly_pieces, opponent_queen_rook_mask, 0);
+    self.set_pinned_in_ray_direction(king_sq, friendly_pieces, opponent_queen_rook_mask, 2);
+    self.set_pinned_in_ray_direction(king_sq, friendly_pieces, opponent_queen_rook_mask, 4);
+    self.set_pinned_in_ray_direction(king_sq, friendly_pieces, opponent_queen_rook_mask, 6);
+
+    // Queen-Bishop directions
+    self.set_pinned_in_ray_direction(king_sq, friendly_pieces, opponent_queen_bishop_mask, 1);
+    self.set_pinned_in_ray_direction(king_sq, friendly_pieces, opponent_queen_bishop_mask, 3);
+    self.set_pinned_in_ray_direction(king_sq, friendly_pieces, opponent_queen_bishop_mask, 5);
+    self.set_pinned_in_ray_direction(king_sq, friendly_pieces, opponent_queen_bishop_mask, 7);
+  }
+
+  pub(in super) fn set_pinned_in_ray_direction(&mut self, king_sq: u32, friendly_pieces: u64, attackers: u64, dir: u8) {
+    let is_up: bool = dir / 4 == 0;
+    let mask: u64 = RAY_TABLE[king_sq as usize][dir as usize];
+    let blockers: u64 = self.occupancy[2] & mask;
+    if blockers == 0 { return; }
+    let first_blocker_sq: u32 = if is_up { blockers.trailing_zeros() } else { 63 - blockers.leading_zeros() };
+    if (friendly_pieces & 1 << first_blocker_sq) != 0 {
+      let blockers: u64 = blockers & !(1 << first_blocker_sq);
+      if blockers == 0 { return; }
+      let second_blocker_sq: u32 = if is_up { blockers.trailing_zeros() } else { 63 - blockers.leading_zeros() };
+
+      if (attackers & 1 << second_blocker_sq) != 0 {
+        self.pinned_squares[first_blocker_sq as usize] = dir % 4;
+        self.pin_mask |= 1 << first_blocker_sq;
+      }
+    }
+  }
+
+  #[inline]
+  pub(in super) fn get_pin_masked_moves(&self, moves: u64, sq: u32) -> u64 {
+    let sq: usize = sq as usize;
+    if self.pinned_squares[sq] == 4 { return moves; }
+    let dir: u8 = self.pinned_squares[sq];
+    return moves & (RAY_TABLE[sq][dir as usize] | RAY_TABLE[sq][4 + dir as usize]);
+  }
+}
+
+// <----- TESTS ----->
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+
+  #[test]
+  fn check_test_test() {
+
+    let fens = [
+      "rnb1k1nr/pppppppp/4q3/8/1b6/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",      // no check
+      "rnb1k1nr/pppppppp/4q3/8/1b1P4/8/PPP1PPPP/RNBQKBNR w KQkq d3 0 1",   // single check
+      "rnb1k1nr/ppp1p2p/3pq1p1/8/1b1P1P2/8/PPP2PPP/RNBQKBNR w KQkq - 0 1"  // double check
+      ];
+    let expected_results = [
+      CheckInfo { check_count: 0, move_mask: 0xFFFF_FFFF_FFFF_FFFF },
+      CheckInfo { check_count: 1, move_mask: 0x0000_0000_0204_0800 },
+      CheckInfo { check_count: 2, move_mask: 0x0000_0000_0000_0000 }
+    ];
+
+    for test_nr in 0..3 {
+      let fen = fens[test_nr];
+      let board =  Board::build(fen);
+      let check_test_actual = board.check_test();
+      assert_eq!(check_test_actual.check_count, expected_results[test_nr].check_count);
+      assert_eq!(check_test_actual.move_mask, expected_results[test_nr].move_mask);
+    }
+
+  }
+}

engine/src/bitboard/movebuffer.rs

@@ -0,0 +1,44 @@
+use super::bitmove::BitMove;
+
+pub struct MoveBuffer {
+
+  buffer: [BitMove; 256],
+  count: usize
+}
+
+impl MoveBuffer {
+
+  pub fn new() -> Self {
+    return Self {
+      buffer: [BitMove::quiet(0, 0, None); 256],
+      count: 0
+    };
+  }
+
+  #[inline]
+  pub fn add(&mut self, bitmove: BitMove) {
+    self.buffer[self.count] = bitmove;
+    self.count += 1;
+  }
+  #[inline]
+  pub fn append(&mut self, other: &MoveBuffer) {
+    self.buffer[self.count..self.count + other.count()].copy_from_slice(other.contents());
+    self.count += other.count();
+  }
+  #[inline(always)]
+  pub fn clear(&mut self) {
+    self.count = 0;
+  }
+  #[inline(always)]
+  pub fn count(&self) -> usize{
+    return self.count;
+  }
+  #[inline(always)]
+  pub fn get(&self, idx: usize) -> &BitMove {
+    return &self.buffer[idx];
+  }
+  #[inline(always)]
+  pub fn contents(&self) -> &[BitMove] {
+    return &self.buffer[0..self.count];
+  } 
+}

engine/src/bitboard/movegen.rs

@@ -0,0 +1,67 @@
+mod pawns;
+mod knights;
+mod bishops;
+mod rooks;
+mod queens;
+mod kings;
+
+use super::board::Board;
+use super::movebuffer::MoveBuffer;
+use super::bitmove::BitMove;
+use super::checkinfo::CheckInfo;
+use super::utils::*;
+
+impl Board {
+
+  const NO_FILTER: u64 = 0xFFFF_FFFF_FFFF_FFFF;
+
+  pub fn collect_moves(&mut self, buffer: &mut MoveBuffer, temp_buffer: &mut MoveBuffer) -> bool {
+    buffer.clear();
+    self.calc_pinned_squares();
+    let check_info = self.check_test();
+
+    match check_info.check_count {
+      0 => self.collect_all_moves(buffer, temp_buffer),
+      1 => self.collect_moves_single_check(buffer, temp_buffer, &check_info),
+      2 => self.collect_king_evasion(buffer, temp_buffer),
+      _ => panic!("More than 2 checking pieces found as the same time!")
+    }
+    return check_info.check_count > 0;
+  }
+
+  pub(in super) fn collect_all_moves(&self, buffer: &mut MoveBuffer, temp_buffer: &mut MoveBuffer) {
+    let safe_squares = self.get_safe_king_squares();
+
+    self.add_pawn_moves(buffer, temp_buffer, Self::NO_FILTER);
+    self.add_knight_moves(buffer, temp_buffer, Self::NO_FILTER);
+    self.add_bishop_moves(buffer, temp_buffer, Self::NO_FILTER);
+    self.add_rook_moves(buffer, temp_buffer, Self::NO_FILTER);
+    self.add_queen_moves(buffer, temp_buffer, Self::NO_FILTER);
+    self.add_king_moves(buffer, temp_buffer, safe_squares);
+    self.add_king_castles(buffer, safe_squares);
+
+    buffer.append(temp_buffer);
+    temp_buffer.clear();
+  }
+  pub(in super) fn collect_moves_single_check(&self, buffer: &mut MoveBuffer, temp_buffer: &mut MoveBuffer, check_info: &CheckInfo) {
+    let safe_squares = self.get_safe_king_squares();
+
+    self.add_pawn_moves(buffer, temp_buffer, check_info.move_mask);
+    self.add_knight_moves(buffer, temp_buffer, check_info.move_mask);
+    self.add_bishop_moves(buffer, temp_buffer, check_info.move_mask);
+    self.add_rook_moves(buffer, temp_buffer, check_info.move_mask);
+    self.add_queen_moves(buffer, temp_buffer, check_info.move_mask);
+    self.add_king_moves(buffer, temp_buffer, safe_squares);
+
+    buffer.append(temp_buffer);
+    temp_buffer.clear();
+  }
+  pub(in super) fn collect_king_evasion(&self, buffer: &mut MoveBuffer, temp_buffer: &mut MoveBuffer) {
+    let safe_squares = self.get_safe_king_squares();
+
+    self.add_king_moves(buffer, temp_buffer, safe_squares);
+
+    buffer.append(&temp_buffer);
+    temp_buffer.clear();
+  }
+}

engine/src/bitboard/movegen/bishops.rs

@@ -0,0 +1,55 @@
+use super::*;
+
+impl Board {
+
+  pub fn add_bishop_moves(&self, capture_buffer: &mut MoveBuffer, quiet_buffer: &mut MoveBuffer, move_mask: u64) {
+    let piece_index = 2 + self.side_to_move * 6;
+    let mut bishops = self.bitboards[piece_index as usize];
+    let empty = !self.occupancy[2];
+    let opponents = self.occupancy[1 - self.side_to_move as usize];
+    while bishops != 0 {
+      let from_sq = pop_lsb(&mut bishops);
+      let raw_move_map = self.get_pseudo_bishop_moves(from_sq) & move_mask;
+      let move_map = self.get_pin_masked_moves(raw_move_map, from_sq);
+
+      let mut quiet_map = move_map & empty;
+      let mut capture_map = move_map & opponents;
+
+      while quiet_map != 0 {
+        let to_sq = pop_lsb(&mut quiet_map);
+        quiet_buffer.add(BitMove::quiet(
+          from_sq as u8,
+          to_sq as u8,
+          None
+        ));
+      }
+      while capture_map != 0 {
+        let to_sq = pop_lsb(&mut capture_map);
+        capture_buffer.add(BitMove::capture(
+          from_sq as u8,
+          to_sq as u8,
+          None
+        ));
+      }
+    }
+  }
+  pub fn add_bishop_captures(&self, buffer: &mut MoveBuffer, move_mask: u64) {
+    let offset = 6 * self.side_to_move as usize;
+    let mut bishops: u64 = self.bitboards[2 + offset];
+    let opponents = self.occupancy[1 - self.side_to_move as usize];
+    while bishops != 0 {
+      let next_sq: u32 = pop_lsb(&mut bishops);
+      let mut attacks: u64 = self.get_pseudo_bishop_moves(next_sq) & opponents & move_mask;
+      attacks = self.get_pin_masked_moves(attacks, next_sq);
+
+      while attacks != 0 {
+        let to_sq = pop_lsb(&mut attacks);
+        buffer.add(BitMove::capture(
+          next_sq as u8,
+          to_sq as u8,
+          None
+        ));
+      }
+    }
+  }
+}

engine/src/bitboard/movegen/kings.rs

@@ -0,0 +1,88 @@
+use super::*;
+
+impl Board {
+
+  pub fn add_king_moves(&self, capture_buffer: &mut MoveBuffer, quiet_buffer: &mut MoveBuffer, move_mask: u64) {
+    let piece_index = 5 + self.side_to_move * 6;
+    let mut kings = self.bitboards[piece_index as usize];
+    let empty = !self.occupancy[2];
+    let opponents = self.occupancy[1 - self.side_to_move as usize];
+    while kings != 0 {
+      let from_sq = pop_lsb(&mut kings);
+      let move_map = self.get_pseudo_king_moves(from_sq) & move_mask;
+
+      let mut quiet_map = move_map & empty;
+      let mut capture_map = move_map & opponents;
+
+      while quiet_map != 0 {
+        let to_sq = pop_lsb(&mut quiet_map);
+        quiet_buffer.add(BitMove::quiet(
+          from_sq as u8,
+          to_sq as u8,
+          None
+        ));
+      }
+      while capture_map != 0 {
+        let to_sq = pop_lsb(&mut capture_map);
+        capture_buffer.add(BitMove::capture(
+          from_sq as u8,
+          to_sq as u8,
+          None
+        ));
+      }
+    }
+  }
+  pub fn add_king_captures(&self, buffer: &mut MoveBuffer, move_mask: u64) {
+    let offset = 6 * self.side_to_move as usize;
+    let mut kings: u64 = self.bitboards[5 + offset];
+    let opponents = self.occupancy[1 - self.side_to_move as usize];
+    while kings != 0 {
+      let next_sq: u32 = pop_lsb(&mut kings);
+      let mut attacks: u64 = self.get_pseudo_king_moves(next_sq) & opponents & move_mask;
+      attacks = self.get_pin_masked_moves(attacks, next_sq);
+
+      while attacks != 0 {
+        let to_sq = pop_lsb(&mut attacks);
+        buffer.add(BitMove::capture(
+          next_sq as u8,
+          to_sq as u8,
+          None
+        ));
+      }
+    }
+  }
+  pub fn add_king_castles(&self, buffer: &mut MoveBuffer, move_mask: u64) {
+    if self.castling_rights & (0b11 << (2 - 2 * self.side_to_move)) == 0 {
+      return;
+    }
+    
+    let offset = 5 + 6 * self.side_to_move as u8;
+    let castle_offset = 2 - 2 * self.side_to_move as u8;
+    let castling_rights = self.castling_rights & 3 << castle_offset;
+    let occupied = self.occupancy[2];
+    let king_sq = self.bitboards[offset as usize].trailing_zeros();
+      
+    let queenside_mask = 0b111 << (king_sq - 3);
+    let kingside_mask = 0b11 << (king_sq + 1);
+
+    if (castling_rights & 1 << castle_offset) != 0
+        && queenside_mask & occupied == 0
+        && !move_mask & 0b11 << (king_sq - 2) == 0
+        && !self.is_square_attacked(king_sq - 2) {
+      buffer.add(BitMove::castle(
+        king_sq as u8,
+        (king_sq - 2) as u8
+      ));
+    }
+    if (castling_rights & 2 << castle_offset) != 0
+        && kingside_mask & occupied == 0
+        && !move_mask & 0b11 << (king_sq + 1) == 0
+        && !self.is_square_attacked(king_sq + 2) {
+      buffer.add(BitMove::castle(
+        king_sq as u8,
+        (king_sq + 2) as u8
+      ));
+    }
+    
+  }
+}

engine/src/bitboard/movegen/knights.rs

@@ -0,0 +1,55 @@
+use super::*;
+
+impl Board {
+
+  pub fn add_knight_moves(&self, capture_buffer: &mut MoveBuffer, quiet_buffer: &mut MoveBuffer, move_mask: u64) {
+    let piece_index = 1 + self.side_to_move * 6;
+    let mut knights = self.bitboards[piece_index as usize];
+    let empty = !self.occupancy[2];
+    let opponents = self.occupancy[1 - self.side_to_move as usize];
+    while knights != 0 {
+      let from_sq = pop_lsb(&mut knights);
+      let raw_move_map = self.get_pseudo_knight_moves(from_sq) & move_mask;
+      let move_map = self.get_pin_masked_moves(raw_move_map, from_sq);
+
+      let mut quiet_map = move_map & empty;
+      let mut capture_map = move_map & opponents;
+
+      while quiet_map != 0 {
+        let to_sq = pop_lsb(&mut quiet_map);
+        quiet_buffer.add(BitMove::quiet(
+          from_sq as u8,
+          to_sq as u8,
+          None
+        ));
+      }
+      while capture_map != 0 {
+        let to_sq = pop_lsb(&mut capture_map);
+        capture_buffer.add(BitMove::capture(
+          from_sq as u8,
+          to_sq as u8,
+          None
+        ));
+      }
+    }
+  }
+  pub fn add_knight_captures(&self, buffer: &mut MoveBuffer, move_mask: u64) {
+    let offset = 6 * self.side_to_move as usize;
+    let mut knights: u64 = self.bitboards[1 + offset];
+    let opponents = self.occupancy[1 - self.side_to_move as usize];
+    while knights != 0 {
+      let next_sq: u32 = pop_lsb(&mut knights);
+      let mut attacks: u64 = self.get_pseudo_knight_moves(next_sq) & opponents & move_mask;
+      attacks = self.get_pin_masked_moves(attacks, next_sq);
+
+      while attacks != 0 {
+        let to_sq = pop_lsb(&mut attacks);
+        buffer.add(BitMove::capture(
+          next_sq as u8,
+          to_sq as u8,
+          None
+        ));
+      }
+    }
+  }
+}

engine/src/bitboard/movegen/pawns.rs

@@ -0,0 +1,76 @@
+use super::*;
+
+impl Board {
+
+  pub fn add_pawn_quiets(&self, buffer: &mut MoveBuffer, move_mask: u64) {
+    let offset: u8 = self.side_to_move * 6;
+    let mut pawns: u64 = self.bitboards[offset as usize];
+    while pawns != 0 {
+      let next_sq = pop_lsb(&mut pawns);
+
+      let mut quiets: u64 = self.get_pseudo_pawn_moves(next_sq) & move_mask;
+      quiets = self.get_pin_masked_moves(quiets, next_sq);
+      while quiets != 0 {
+        let to_sq = quiets.trailing_zeros();
+
+        if (self.side_to_move == 0 && quiets.trailing_zeros() / 8 == 7)
+        || (self.side_to_move == 1 && quiets.trailing_zeros() / 8 == 0) {
+          for piece_type in [4, 3, 2, 1] {
+            buffer.add(BitMove::quiet(
+              next_sq as u8,
+              to_sq as u8,
+              Some(piece_type)
+            ));
+          }
+        }
+        else {
+          buffer.add(BitMove::quiet(
+            next_sq as u8,
+            to_sq as u8,
+            None
+          ));
+        }
+        quiets &= !(1 << to_sq);
+      }
+    }
+  }
+  pub fn add_pawn_captures(&self, buffer: &mut MoveBuffer, move_mask: u64) {
+    let offset = 6 * self.side_to_move as usize;
+    let mut pawns: u64 = self.bitboards[offset];
+    let opponents = self.occupancy[1 - self.side_to_move as usize];
+    while pawns != 0 {
+      let next_sq = pop_lsb(&mut pawns);
+
+      let mut attacks: u64 = self.get_pseudo_pawn_captures(next_sq) & move_mask;
+      attacks = self.get_pin_masked_moves(attacks, next_sq);
+      attacks &= opponents;
+
+      while attacks != 0 {
+        let to_sq = attacks.trailing_zeros();
+
+        if (self.side_to_move == 0 && attacks.trailing_zeros() / 8 == 7)
+        || (self.side_to_move == 1 && attacks.trailing_zeros() / 8 == 0) {
+          for piece_type in [4, 3, 2, 1] {
+            buffer.add(BitMove::capture(
+              next_sq as u8,
+              to_sq as u8,
+              Some(piece_type)
+            ));
+          }
+        }
+        else {
+          buffer.add(BitMove::capture(
+            next_sq as u8,
+            to_sq as u8,
+            None
+          ));
+        }
+        attacks &= !(1 << to_sq);
+      }
+    }
+  }
+  pub fn add_pawn_moves(&self, capture_buffer: &mut MoveBuffer, quiet_buffer: &mut MoveBuffer, move_mask: u64) {
+    self.add_pawn_captures(capture_buffer, move_mask);
+    self.add_pawn_quiets(quiet_buffer, move_mask);
+  }
+}

engine/src/bitboard/movegen/queens.rs

@@ -0,0 +1,55 @@
+use super::*;
+
+impl Board {
+
+  pub fn add_queen_moves(&self, capture_buffer: &mut MoveBuffer, quiet_buffer: &mut MoveBuffer, move_mask: u64) {
+    let piece_index = 4 + self.side_to_move * 6;
+    let mut queens = self.bitboards[piece_index as usize];
+    let empty = !self.occupancy[2];
+    let opponents = self.occupancy[1 - self.side_to_move as usize];
+    while queens != 0 {
+      let from_sq = pop_lsb(&mut queens);
+      let raw_move_map = self.get_pseudo_queen_moves(from_sq) & move_mask;
+      let move_map = self.get_pin_masked_moves(raw_move_map, from_sq);
+
+      let mut quiet_map = move_map & empty;
+      let mut capture_map = move_map & opponents;
+
+      while quiet_map != 0 {
+        let to_sq = pop_lsb(&mut quiet_map);
+        quiet_buffer.add(BitMove::quiet(
+          from_sq as u8,
+          to_sq as u8,
+          None
+        ));
+      }
+      while capture_map != 0 {
+        let to_sq = pop_lsb(&mut capture_map);
+        capture_buffer.add(BitMove::capture(
+          from_sq as u8,
+          to_sq as u8,
+          None
+        ));
+      }
+    }
+  }
+  pub fn add_queen_captures(&self, buffer: &mut MoveBuffer, move_mask: u64) {
+    let offset = 6 * self.side_to_move as usize;
+    let mut queens: u64 = self.bitboards[4 + offset];
+    let opponents = self.occupancy[1 - self.side_to_move as usize];
+    while queens != 0 {
+      let next_sq: u32 = pop_lsb(&mut queens);
+      let mut attacks: u64 = self.get_pseudo_queen_moves(next_sq) & opponents & move_mask;
+      attacks = self.get_pin_masked_moves(attacks, next_sq);
+
+      while attacks != 0 {
+        let to_sq = pop_lsb(&mut attacks);
+        buffer.add(BitMove::capture(
+          next_sq as u8,
+          to_sq as u8,
+          None
+        ));
+      }
+    }
+  }
+}

engine/src/bitboard/movegen/rooks.rs

@@ -0,0 +1,55 @@
+use super::*;
+
+impl Board {
+
+  pub fn add_rook_moves(&self, capture_buffer: &mut MoveBuffer, quiet_buffer: &mut MoveBuffer, move_mask: u64) {
+    let piece_index = 3 + self.side_to_move * 6;
+    let mut rooks = self.bitboards[piece_index as usize];
+    let empty = !self.occupancy[2];
+    let opponents = self.occupancy[1 - self.side_to_move as usize];
+    while rooks != 0 {
+      let from_sq = pop_lsb(&mut rooks);
+      let raw_move_map = self.get_pseudo_rook_moves(from_sq) & move_mask;
+      let move_map = self.get_pin_masked_moves(raw_move_map, from_sq);
+
+      let mut quiet_map = move_map & empty;
+      let mut capture_map = move_map & opponents;
+
+      while quiet_map != 0 {
+        let to_sq = pop_lsb(&mut quiet_map);
+        quiet_buffer.add(BitMove::quiet(
+          from_sq as u8,
+          to_sq as u8,
+          None
+        ));
+      }
+      while capture_map != 0 {
+        let to_sq = pop_lsb(&mut capture_map);
+        capture_buffer.add(BitMove::capture(
+          from_sq as u8,
+          to_sq as u8,
+          None
+        ));
+      }
+    }
+  }
+  pub fn add_rook_captures(&self, buffer: &mut MoveBuffer, move_mask: u64) {
+    let offset = 6 * self.side_to_move as usize;
+    let mut rooks: u64 = self.bitboards[3 + offset];
+    let opponents = self.occupancy[1 - self.side_to_move as usize];
+    while rooks != 0 {
+      let next_sq: u32 = pop_lsb(&mut rooks);
+      let mut attacks: u64 = self.get_pseudo_rook_moves(next_sq) & opponents & move_mask;
+      attacks = self.get_pin_masked_moves(attacks, next_sq);
+
+      while attacks != 0 {
+        let to_sq = pop_lsb(&mut attacks);
+        buffer.add(BitMove::capture(
+          next_sq as u8,
+          to_sq as u8,
+          None
+        ));
+      }
+    }
+  }
+}

engine/src/bitboard/utils.rs

@@ -1,13 +1,13 @@
 #[inline(always)]
-pub fn pop_lsb(value: &mut u64) -> usize {
-  let idx = value.trailing_zeros() as usize;
+pub fn pop_lsb(value: &mut u64) -> u32 {
+  let idx = value.trailing_zeros();
   *value &= !(1 << idx);
   return idx;
 }
 
 #[inline(always)]
-pub fn pop_msb(value: &mut u64) -> usize {
-  let idx = 63 - value.leading_zeros() as usize;
+pub fn pop_msb(value: &mut u64) -> u32 {
+  let idx = 63 - value.leading_zeros();
   *value &= !(1 << idx);
   return idx;
 }
@@ -27,6 +27,32 @@ pub fn notation_from_square_number(sq: u8) -> String {
   return notation;
 }
 
+pub fn try_get_square_number_from_notation(notation: &str) -> Result<u8, ()> {
+
+  let file = match notation.chars().nth(0).unwrap() {
+    'a' => 0,
+    'b' => 1,
+    'c' => 2,
+    'd' => 3,
+    'e' => 4,
+    'f' => 5,
+    'g' => 6,
+    'h' => 7,
+     _  => { return Result::Err(()); }
+  };
+  if let Some(rank) = notation.chars().nth(1) {
+    return Result::Ok(file + 8 * (rank.to_digit(10).unwrap() as u8) - 8);
+  }
+  else {
+    return Result::Err(());
+  }
+}
+
+const PIECE_CHARACTERS: [char; 12] = ['P', 'N', 'B', 'R', 'Q', 'K', 'p', 'n', 'b', 'r', 'q', 'k'];
+pub fn get_character_by_piece_id(id: u8) -> char {
+  return PIECE_CHARACTERS[id as usize];
+}
+
 
 // <----- TESTS ----->
 
@@ -46,7 +72,7 @@ mod tests {
       0xBEAC_DBE0_903A_AC00,
       0x01E8_C895_A6F0_0000
     ];
-    let expected_values: [usize; 6] = [63, 0, 4, 2, 10, 20];
+    let expected_values: [u32; 6] = [63, 0, 4, 2, 10, 20];
 
     // tests
     for index in 0..6 {
@@ -66,7 +92,7 @@ mod tests {
       0x0000_C1C3_201C_0DB1,
       0x0000_0203_0DE4_E944
     ];
-    let expected_values: [usize; 6] = [63, 0, 61, 57, 47, 41];
+    let expected_values: [u32; 6] = [63, 0, 61, 57, 47, 41];
 
     // tests
     for index in 0..6 {

engine/src/boardsquare.rs

@@ -0,0 +1,48 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize)]
+pub struct BoardSquare {
+    pub x: usize,
+    pub y: usize,
+}
+
+impl BoardSquare {
+    pub fn new() -> Self {
+        return Self { x: 0, y: 0 };
+    }
+
+    pub fn from_coord(x: usize, y: usize) -> Self {
+        #[cfg(debug_assertions)]
+        {
+            if x > 7 {
+                println!(
+                    "Warning: x coordinate of square is bigger than 7, it might not be on the board!"
+                );
+            }
+            if y > 7 {
+                println!(
+                    "Warning: y coordinate of square is bigger than 7, it might not be on the board!"
+                );
+            }
+        }
+        return Self { x: x, y: y };
+    }
+
+    pub(in super) fn from_index(idx: u8) -> Self {
+        let file = idx % 8;
+        let rank = idx / 8;
+        
+        #[cfg(debug_assertions)]
+        {
+            if !(0..8).contains(&rank) {
+                println!("Warning: internal engine issue, given index is not on the board!");
+            }
+        }
+
+        return Self {x: file as usize, y: rank as usize};
+    }
+    pub(in super) fn to_index(&self) -> u8 {
+        return (8 * self.y + self.x) as u8;
+    }
+}
+

engine/src/chessmove.rs

@@ -0,0 +1,192 @@
+use crate::{bitboard::{bitmove::{BitMove, BitMoveType}, board::Board}};
+
+use super::boardsquare::BoardSquare;
+use super::piecetype::PieceType;
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize)]
+/*pub struct ChessMove {
+    pub move_type: MoveType,
+    pub piece_type: PieceType,
+    pub from_square: BoardSquare,
+    pub to_square: BoardSquare,
+    pub rook_from: BoardSquare,
+    pub rook_to: BoardSquare,
+    pub promotion_piece: Option<PieceType>,
+}*/
+pub enum ChessMove {
+    Quiet {
+        piece_type: PieceType,
+        from_square: BoardSquare,
+        to_square: BoardSquare,
+        promotion_piece: Option<PieceType>
+    },
+    Capture {
+        piece_type: PieceType,
+        from_square: BoardSquare,
+        to_square: BoardSquare,
+        captured_piece: PieceType,
+        promotion_piece: Option<PieceType>
+    },
+    Castle {
+        king_type: PieceType,
+        king_from: BoardSquare,
+        king_to: BoardSquare,
+        rook_type: PieceType,
+        rook_from: BoardSquare,
+        rook_to: BoardSquare
+    },
+    EnPassant {
+        pawn_type: PieceType,
+        from_square: BoardSquare,
+        to_square: BoardSquare,
+        captured_piece: PieceType,
+        captured_from: BoardSquare
+    }
+}
+
+impl ChessMove {
+    pub fn quiet(
+        piece_type: PieceType,
+        from_square: BoardSquare,
+        to_square: BoardSquare,
+        promotion_piece: Option<PieceType>,
+    ) -> Self {
+        return Self::Quiet {
+            piece_type,
+            from_square,
+            to_square,
+            promotion_piece
+        };
+    }
+
+    pub fn capture(
+        piece_type: PieceType,
+        from_square: BoardSquare,
+        to_square: BoardSquare,
+        captured_piece: PieceType,
+        promotion_piece: Option<PieceType>,
+    ) -> Self {
+        return Self::Capture {
+            piece_type,
+            from_square,
+            to_square,
+            captured_piece,
+            promotion_piece
+        };
+    }
+
+    pub fn castle(
+        king_type: PieceType,
+        king_from: BoardSquare,
+        king_to: BoardSquare,
+        rook_type: PieceType,
+        rook_from: BoardSquare,
+        rook_to: BoardSquare,
+    ) -> Self {
+        return Self::Castle {
+            king_type,
+            king_from,
+            king_to,
+            rook_type,
+            rook_from,
+            rook_to
+        };
+    }
+
+    pub(in super) fn from_bitmove(bitmove: &BitMove, board: Board) -> Self {
+        match bitmove.move_type() {
+            BitMoveType::Quiet => {
+                let from_square_index = bitmove.from_square();
+                let piece_type = PieceType::from_index(board.piece_board(from_square_index));
+                let from_square = BoardSquare::from_index(from_square_index);
+                let to_square = BoardSquare::from_index(bitmove.to_square());
+                let promotion_piece = match bitmove.promotion_piece() {
+                    Some(piece) => Some(PieceType::from_index(piece)),
+                    None => None
+                };
+
+                return ChessMove::Quiet { piece_type, from_square, to_square, promotion_piece }
+            },
+            BitMoveType::Capture => {
+                let from_square_index = bitmove.from_square();
+                let to_square_index = bitmove.to_square();
+                let piece_type = PieceType::from_index(board.piece_board(from_square_index));
+                let from_square = BoardSquare::from_index(from_square_index);
+                let to_square = BoardSquare::from_index(to_square_index);
+                let captured_piece = PieceType::from_index(board.piece_board(to_square_index));
+                let promotion_piece = match bitmove.promotion_piece() {
+                    Some(piece) => Some(PieceType::from_index(piece)),
+                    None => None
+                };
+
+                return ChessMove::Capture { piece_type, from_square, to_square, captured_piece, promotion_piece }
+            },
+            BitMoveType::Castle => {
+                let from_square_index = bitmove.from_square();
+                let to_square_index = bitmove.to_square();
+                let king_type = PieceType::from_index(board.piece_board(from_square_index));
+                let king_from = BoardSquare::from_index(from_square_index);
+                let king_to = BoardSquare::from_index(to_square_index);
+                let promotion_piece = match bitmove.promotion_piece() {
+                    Some(piece) => Some(PieceType::from_index(piece)),
+                    None => None
+                };
+                let rook_type = if bitmove.from_square() < 32 { PieceType::WhiteRook } else { PieceType::BlackRook };
+                let rook_from_index = if bitmove.to_square() > bitmove.from_square() {
+                    bitmove.from_square() + 3
+                } else {
+                    bitmove.from_square() - 4
+                };
+                let rook_from = BoardSquare::from_index(rook_from_index);
+                let rook_to_index = if bitmove.to_square() > bitmove.from_square() {
+                    bitmove.from_square() + 1
+                } else {
+                    bitmove.from_square() - 1
+                };
+                let rook_to = BoardSquare::from_index(rook_to_index);
+
+                return ChessMove::Castle { king_type, king_from, king_to, rook_type, rook_from, rook_to }
+            },
+            BitMoveType::EnPassant => {
+                panic!("ChessMove::from_bitmove was left unimplemented");
+            }
+        }
+    }
+    pub(in super) fn to_bitmove(&self) -> BitMove {
+        let bitmove = match self {
+            ChessMove::Quiet { piece_type, from_square, to_square, promotion_piece } => {
+                let promotion_piece = match promotion_piece {
+                    Some(piece) => Some(piece.to_index()),
+                    None => None
+                };
+                return BitMove::quiet(
+                    from_square.to_index(),
+                    to_square.to_index(),
+                    promotion_piece
+                );
+            },
+            ChessMove::Capture { piece_type, from_square, to_square, captured_piece, promotion_piece } => {
+                let promotion_piece = match promotion_piece {
+                    Some(piece) => Some(piece.to_index()),
+                    None => None
+                };
+                return BitMove::capture(
+                    from_square.to_index(),
+                    to_square.to_index(),
+                    promotion_piece
+                );
+            },
+            ChessMove::Castle { king_type, king_from, king_to, rook_type, rook_from, rook_to } => {
+                return BitMove::castle(
+                    king_from.to_index(),
+                    king_to.to_index()
+                );
+            },
+            ChessMove::EnPassant { pawn_type, from_square, to_square, captured_piece, captured_from } => {
+                panic!("ChessMove::to_bitmove was left unimplemented");
+            }
+        };
+        return bitmove;
+    }
+}

engine/src/gameend.rs

@@ -0,0 +1,6 @@
+
+pub enum GameEnd {
+  WhiteWon(String),
+  BlackWon(String),
+  Draw(String)
+}

engine/src/lib.rs

@@ -0,0 +1,24 @@
+mod bitboard;
+pub mod chessmove;
+pub mod piecetype;
+pub mod boardsquare;
+pub mod movetype;
+pub mod gameend;
+
+use chessmove::ChessMove;
+use gameend::GameEnd;
+
+pub fn get_available_moves(fen: &str) -> Vec<ChessMove> {
+  println!("get_available_moves answered");
+  return vec![];
+}
+
+pub fn is_game_over(fen: &str) -> Option<GameEnd> {
+  println!("is_game_over answered");
+  return None;
+}
+
+pub fn get_board_after_move(fen: &str, chess_move: &ChessMove) -> String {
+  println!("get_board_after_move answered");
+  return String::from("rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1");
+}

engine/src/movetype.rs

@@ -0,0 +1,31 @@
+use serde::Deserialize;
+use serde::Serialize;
+use super::bitboard::bitmove::BitMoveType;
+
+#[derive(Serialize, Deserialize)]
+pub enum MoveType {
+    Quiet,
+    Capture,
+    Castle,
+    EnPassant,
+}
+
+impl MoveType {
+    pub(in super) fn from_bitmovetype(move_type: BitMoveType) -> Self {
+        return match move_type {
+            BitMoveType::Quiet => Self::Quiet,
+            BitMoveType::Capture => Self::Capture,
+            BitMoveType::Castle => Self::Castle,
+            BitMoveType::EnPassant => Self::EnPassant,
+            _ => panic!("invalid move_type index! should NEVER appear")
+        }
+    }
+    pub(in super) fn to_bitmoveType(&self) -> BitMoveType {
+        return match self {
+            &MoveType::Quiet => BitMoveType::Quiet,
+            &MoveType::Capture => BitMoveType::Capture,
+            &MoveType::Castle => BitMoveType::Castle,
+            &MoveType::EnPassant => BitMoveType::EnPassant
+        };
+    }
+}

engine/src/piecetype.rs

@@ -0,0 +1,54 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize)]
+pub enum PieceType {
+    WhitePawn,
+    WhiteKnight,
+    WhiteBishop,
+    WhiteRook,
+    WhiteQueen,
+    WhiteKing,
+    BlackPawn,
+    BlackKnight,
+    BlackBishop,
+    BlackRook,
+    BlackQueen,
+    BlackKing,
+}
+
+impl PieceType {
+
+    pub(in super) fn from_index(idx: u8) -> Self {
+        return match idx {
+            0 => PieceType::WhitePawn,
+            1 => PieceType::WhiteKnight,
+            2 => PieceType::WhiteBishop,
+            3 => PieceType::WhiteRook,
+            4 => PieceType::WhiteQueen,
+            5 => PieceType::WhiteKing,
+            6 => PieceType::BlackPawn,
+            7 => PieceType::BlackKnight,
+            8 => PieceType::BlackBishop,
+            9 => PieceType::BlackRook,
+            10 => PieceType::BlackQueen,
+            11 => PieceType::BlackKing,
+            _ => panic!("invalid piece index! should NEVER appear")
+        }
+    }
+    pub(in super) fn to_index(&self) -> u8 {
+        return match self {
+            &PieceType::WhitePawn => 0,
+            &PieceType::WhiteKnight => 1,
+            &PieceType::WhiteBishop => 2,
+            &PieceType::WhiteRook => 3,
+            &PieceType::WhiteQueen => 4,
+            &PieceType::WhiteKing => 5,
+            &PieceType::BlackPawn => 6,
+            &PieceType::BlackKnight => 7,
+            &PieceType::BlackBishop => 8,
+            &PieceType::BlackRook => 9,
+            &PieceType::BlackQueen => 10,
+            &PieceType::BlackKing => 11
+        }
+    }
+}

server/Cargo.toml

@@ -14,6 +14,8 @@ url = "2.5.7"
 uuid = {version = "1.18.1", features = ["v4", "serde"] }
 anyhow = "1.0.100"
 rand = "0.9.2"
+engine = {path = "../engine/"}
+
 
 [[bin]]
 name = "client"

server/src/bin/client.rs

@@ -67,22 +67,9 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
                                         println!("Welcome! Your player ID: {}", player_id);
                                     }
                                 }
-                                "match_found" => {
-                                    if let (Some(opponent), Some(color), Some(match_id)) =
-                                        (parsed.opponent, parsed.color, parsed.match_id)
-                                    {
-                                        println!(
-                                            "Match found! Opponent: {}, Color: {}, Match ID: {}",
-                                            opponent, color, match_id
-                                        );
-                                    }
+                                _ => {
+                                    println!("cucc: {:?}", parsed);
                                 }
-                                "error" => {
-                                    if let Some(reason) = parsed.reason {
-                                        println!("Error: {}", reason);
-                                    }
-                                }
-                                _ => {}
                             }
                         }
                     }

server/src/connection.rs

@@ -1,3 +1,5 @@
+use crate::connection::ClientEvent::*;
+use engine::get_available_moves;
 use futures_util::{SinkExt, StreamExt};
 use serde::{Deserialize, Serialize};
 use std::collections::{HashMap, VecDeque};
@@ -26,6 +28,28 @@ pub fn new_waiting_queue() -> WaitingQueue {
     Arc::new(Mutex::new(VecDeque::new()))
 }
 
+#[derive(Serialize, Deserialize, Debug)]
+pub struct Step {
+    pub from: String,
+    pub to: String,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+#[serde(tag = "type")]
+enum ClientEvent {
+    Join { username: String },
+    FindMatch,
+    Move { from: String, to: String },
+    Resign,
+    Chat { text: String },
+    RequestLegalMoves { fen: String },
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct EventResponse {
+    pub response: Result<(), String>,
+}
+
 #[derive(Debug)]
 pub struct PlayerConnection {
     pub id: Uuid,
@@ -43,12 +67,6 @@ pub struct GameMatch {
     pub move_history: Vec<String>,
 }
 
-#[derive(Serialize, Deserialize, Debug)]
-pub struct Step {
-    pub from: String,
-    pub to: String,
-}
-
 // Message sending utilities
 pub async fn send_message_to_player(
     connections: &ConnectionMap,
@@ -102,7 +120,6 @@ pub async fn handle_connection(
     connections: ConnectionMap,
     matches: MatchMap,
     waiting_queue: WaitingQueue,
-    event_system: crate::events::EventSystem,
 ) -> anyhow::Result<()> {
     use tokio_tungstenite::accept_async;
 
@@ -141,8 +158,52 @@ pub async fn handle_connection(
             let text = message.to_text()?;
             println!("Received from {}: {}", player_id, text);
 
-            // TODO: Parse and handle message with event system
-            // This will be implemented when we integrate the event system
+            let client_data: ClientEvent = serde_json::from_str(text)
+                .expect("Failed to convert data into json at handle_connection");
+
+            println!("client: {:?}", client_data);
+
+            match client_data {
+                Join { username } => {
+                    {
+                        let mut conn_map = connections.lock().await;
+                        let player = conn_map.get_mut(&player_id).unwrap();
+                        player.username = Some(username);
+                    }
+
+                    //respone to client
+                    let response: EventResponse = EventResponse {
+                        response: core::result::Result::Ok(()),
+                    };
+
+                    println!("response: {:?}", response);
+
+                    let _ = send_message_to_player(
+                        &connections,
+                        player_id,
+                        &serde_json::to_string(&response).unwrap(),
+                    )
+                    .await;
+                }
+                FindMatch => {
+                    let mut wait_queue = waiting_queue.lock().await;
+                    wait_queue.push_back(player_id.clone());
+                    println!("Appended {} to the waiting queue", player_id);
+                    println!("queue {:?}", wait_queue);
+                }
+                Move { from, to } => {}
+                RequestLegalMoves { fen } => {
+                    let moves = get_available_moves(&fen);
+                    let _ = send_message_to_player(
+                        &connections,
+                        player_id,
+                        &serde_json::to_string(&moves).unwrap(),
+                    )
+                    .await;
+                    println!("Sent moves to player: {}", player_id);
+                }
+                _ => {}
+            }
         }
     }
 

server/src/events.rs

@@ -1,126 +0,0 @@
-use serde::{Deserialize, Serialize};
-use std::sync::Arc;
-use tokio::sync::Mutex;
-use tokio::sync::mpsc;
-use uuid::Uuid;
-
-#[derive(Serialize, Deserialize, Debug)]
-pub struct Step {
-    pub from: String,
-    pub to: String,
-}
-
-#[derive(Serialize, Deserialize, Debug)]
-#[serde(tag = "type")]
-pub enum ClientEvent {
-    Join { username: String },
-    FindMatch,
-    Move { from: String, to: String },
-    Resign,
-    Chat { text: String },
-    RequestLegalMoves { fen: String },
-}
-
-#[derive(Debug)]
-pub enum ServerEvent {
-    PlayerJoined(Uuid, String),
-    PlayerLeft(Uuid),
-    PlayerJoinedQueue(Uuid),
-    PlayerJoinedMatch(Uuid, Uuid), // player_id, match_id
-    PlayerMove(Uuid, Step),
-    PlayerResigned(Uuid),
-    MatchCreated(Uuid, Uuid, Uuid), // match_id, white_id, black_id
-}
-
-pub struct EventSystem {
-    sender: mpsc::UnboundedSender<(Uuid, ClientEvent)>,
-    receiver: Arc<Mutex<mpsc::UnboundedReceiver<(Uuid, ClientEvent)>>>,
-}
-
-impl Clone for EventSystem {
-    fn clone(&self) -> Self {
-        Self {
-            sender: self.sender.clone(),
-            receiver: Arc::clone(&self.receiver),
-        }
-    }
-}
-
-impl EventSystem {
-    pub fn new() -> Self {
-        let (sender, receiver) = mpsc::unbounded_channel();
-        Self {
-            sender,
-            receiver: Arc::new(Mutex::new(receiver)),
-        }
-    }
-
-    pub async fn send_event(
-        &self,
-        player_id: Uuid,
-        event: ClientEvent,
-    ) -> Result<(), Box<dyn std::error::Error>> {
-        self.sender.send((player_id, event))?;
-        Ok(())
-    }
-
-    pub async fn next_event(&self) -> Option<(Uuid, ClientEvent)> {
-        let mut receiver = self.receiver.lock().await;
-        receiver.recv().await
-    }
-}
-
-impl Default for EventSystem {
-    fn default() -> Self {
-        Self::new()
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use uuid::Uuid;
-
-    #[tokio::test]
-    async fn test_event_system_send_and_receive() {
-        let event_system = EventSystem::new();
-        let player_id = Uuid::new_v4();
-
-        let join_event = ClientEvent::Join {
-            username: "test_user".to_string(),
-        };
-
-        let send_result = event_system.send_event(player_id, join_event).await;
-        assert!(send_result.is_ok(), "Should send event successfully");
-
-        let received = event_system.next_event().await;
-        assert!(received.is_some(), "Should receive sent event");
-
-        let (received_id, received_event) = received.unwrap();
-        assert_eq!(received_id, player_id, "Should receive correct player ID");
-
-        match received_event {
-            ClientEvent::Join { username } => {
-                assert_eq!(username, "test_user", "Should receive correct username");
-            }
-            _ => panic!("Should receive Join event"),
-        }
-    }
-
-    #[tokio::test]
-    async fn test_event_system_clone() {
-        let event_system1 = EventSystem::new();
-        let event_system2 = event_system1.clone();
-
-        let player_id = Uuid::new_v4();
-        let event = ClientEvent::FindMatch;
-
-        event_system1.send_event(player_id, event).await.unwrap();
-
-        let received = event_system2.next_event().await;
-        assert!(
-            received.is_some(),
-            "Cloned event system should receive events"
-        );
-    }
-}

server/src/main.rs

@@ -1,6 +1,6 @@
 mod connection;
-mod events;
 mod matchmaking;
+mod messages;
 use tokio::net::TcpListener;
 
 #[tokio::main]
@@ -14,15 +14,11 @@ async fn main() -> anyhow::Result<()> {
     let matches = connection::new_match_map();
     let waiting_queue = connection::new_waiting_queue();
 
-    // Event system for communication between components
-    let event_system = events::EventSystem::new();
-
     // Start matchmaking background task
     let matchmaker = matchmaking::MatchmakingSystem::new(
         connections.clone(),
         matches.clone(),
         waiting_queue.clone(),
-        event_system.clone(),
     );
     tokio::spawn(async move {
         matchmaker.run().await;
@@ -33,17 +29,10 @@ async fn main() -> anyhow::Result<()> {
         let connections = connections.clone();
         let matches = matches.clone();
         let waiting_queue = waiting_queue.clone();
-        let event_system = event_system.clone();
 
         tokio::spawn(async move {
-            if let Err(e) = connection::handle_connection(
-                stream,
-                connections,
-                matches,
-                waiting_queue,
-                event_system,
-            )
-            .await
+            if let Err(e) =
+                connection::handle_connection(stream, connections, matches, waiting_queue).await
             {
                 eprintln!("Connection error: {}", e);
             }

server/src/matchmaking.rs

@@ -1,5 +1,4 @@
 use crate::connection::{ConnectionMap, GameMatch, MatchMap, WaitingQueue};
-use crate::events::EventSystem;
 use rand::random;
 use uuid::Uuid;
 
@@ -7,21 +6,14 @@ pub struct MatchmakingSystem {
     connections: ConnectionMap,
     matches: MatchMap,
     waiting_queue: WaitingQueue,
-    event_system: EventSystem,
 }
 
 impl MatchmakingSystem {
-    pub fn new(
-        connections: ConnectionMap,
-        matches: MatchMap,
-        waiting_queue: WaitingQueue,
-        event_system: EventSystem,
-    ) -> Self {
+    pub fn new(connections: ConnectionMap, matches: MatchMap, waiting_queue: WaitingQueue) -> Self {
         Self {
             connections,
             matches,
             waiting_queue,
-            event_system,
         }
     }
 
@@ -114,7 +106,6 @@ impl MatchmakingSystem {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::events::EventSystem;
     use uuid::Uuid;
 
     use crate::connection::new_connection_map;
@@ -126,14 +117,9 @@ mod tests {
         let connections = new_connection_map();
         let matches = new_match_map();
         let waiting_queue = new_waiting_queue();
-        let event_system = EventSystem::new();
 
-        let matchmaking = MatchmakingSystem::new(
-            connections.clone(),
-            matches.clone(),
-            waiting_queue.clone(),
-            event_system.clone(),
-        );
+        let matchmaking =
+            MatchmakingSystem::new(connections.clone(), matches.clone(), waiting_queue.clone());
 
         let player1 = Uuid::new_v4();
         let player2 = Uuid::new_v4();
@@ -172,14 +158,9 @@ mod tests {
         let connections = new_connection_map();
         let matches = new_match_map();
         let waiting_queue = new_waiting_queue();
-        let event_system = EventSystem::new();
 
-        let matchmaking = MatchmakingSystem::new(
-            connections.clone(),
-            matches.clone(),
-            waiting_queue.clone(),
-            event_system.clone(),
-        );
+        let matchmaking =
+            MatchmakingSystem::new(connections.clone(), matches.clone(), waiting_queue.clone());
 
         let player1 = Uuid::new_v4();
         {

ui/Cargo.toml

@@ -4,3 +4,7 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
+eframe = "0.33.0"
+egui = "0.33.0"
+tokio-tungstenite = "0.28.0"
+winit = "0.30.12"

ui/src/main.rs

@@ -1,3 +1,431 @@
-fn main() {
-    println!("Hello, world!");
+use eframe::egui;
+
+fn main() -> eframe::Result<()> {
+    let options = eframe::NativeOptions{
+        viewport: egui::ViewportBuilder::default()
+            .with_fullscreen(true)
+            .with_min_inner_size(egui::vec2(800.0, 600.0)) // Minimum width, height
+            .with_inner_size(egui::vec2(7680.0, 4320.0)), // Initial size
+        ..Default::default()
+    };
+    eframe::run_native(
+    "Knightly",
+    options,
+    Box::new(|cc| {
+        let mut fonts = egui::FontDefinitions::default();
+        fonts.font_data.insert(
+            "symbols".to_owned(),
+            egui::FontData::from_static(include_bytes!("../fonts/DejaVuSans.ttf")).into(),
+        );
+        fonts
+            .families
+            .entry(egui::FontFamily::Proportional)
+            .or_default()
+            .insert(0, "symbols".to_owned());
+        cc.egui_ctx.set_fonts(fonts);
+        Ok(Box::new(ChessApp::default()))
+    }),
+)
+}
+
+#[derive(Clone, Copy, PartialEq, Debug)]
+enum Piece {
+    King(char),
+    Queen(char),
+    Rook(char),
+    Bishop(char),
+    Knight(char),
+    Pawn(char),
+    Empty,
+}
+
+impl Piece {
+    fn symbol(&self) -> &'static str {
+        match self {
+            Piece::King('w') => "♔",
+            Piece::Queen('w') => "♕",
+            Piece::Rook('w') => "♖",
+            Piece::Bishop('w') => "♗",
+            Piece::Knight('w') => "♘",
+            Piece::Pawn('w') => "♙",
+            Piece::King('b') => "♚",
+            Piece::Queen('b') => "♛",
+            Piece::Rook('b') => "♜",
+            Piece::Bishop('b') => "♝",
+            Piece::Knight('b') => "♞",
+            Piece::Pawn('b') => "♟︎",
+            Piece::Empty => "",
+            _ => "",
+        }
+    }
+}
+
+#[derive(PartialEq, Debug)]
+enum Turn {
+    White,
+    Black,
+}
+
+enum AppState {
+    MainMenu,
+    InGame,
+    Settings,
+}
+
+struct ChessApp {
+    fullscreen: bool,
+    resolutions: Vec<(u32, u32)>,
+    selected_resolution: usize,
+    state: AppState,
+    board: [[Piece; 8]; 8],
+    selected: Option<(usize, usize)>,
+    turn: Turn,
+    pending_settings: PendingSettings,
+    server_port: String,
+}
+
+#[derive(Default)]
+struct PendingSettings {
+    fullscreen: bool,
+    selected_resolution: usize,
+    server_port: String,
+}
+
+impl Default for ChessApp {
+    fn default() -> Self {
+        Self {
+            fullscreen: true,
+            resolutions: vec![
+                (1280, 720),
+                (1600, 900),
+                (1920, 1080),
+                (2560, 1440),
+                (3840, 2160),
+                (7680, 4320),
+            ],
+            selected_resolution: 2, // Default to 1920x1080
+            state: AppState::MainMenu,
+            board: Self::starting_board(),
+            selected: None,
+            turn: Turn::White,
+            pending_settings: PendingSettings::default(),
+            server_port: "8080".to_string(), // Default port
+        }
+    }
+}
+
+impl ChessApp {
+    fn starting_board() -> [[Piece; 8]; 8] {
+        use Piece::*;
+        [
+            [
+                Rook('b'),
+                Knight('b'),
+                Bishop('b'),
+                Queen('b'),
+                King('b'),
+                Bishop('b'),
+                Knight('b'),
+                Rook('b'),
+            ],
+            [Pawn('b'); 8],
+            [Empty; 8],
+            [Empty; 8],
+            [Empty; 8],
+            [Empty; 8],
+            [Pawn('w'); 8],
+            [
+                Rook('w'),
+                Knight('w'),
+                Bishop('w'),
+                Queen('w'),
+                King('w'),
+                Bishop('w'),
+                Knight('w'),
+                Rook('w'),
+            ],
+        ]
+    }
+
+    fn handle_click(&mut self, row: usize, col: usize) {
+        if let Some((r, c)) = self.selected {
+            let piece = self.board[r][c];
+            self.board[r][c] = Piece::Empty;
+            self.board[row][col] = piece;
+            self.selected = None;
+            self.turn = if self.turn == Turn::White {
+                Turn::Black
+            } else {
+                Turn::White
+            };
+        } else {
+            if self.board[row][col] != Piece::Empty {
+                self.selected = Some((row, col));
+            }
+        }
+    }
+
+    fn apply_settings(&mut self, ctx: &egui::Context) {
+        self.fullscreen = self.pending_settings.fullscreen;
+        self.selected_resolution = self.pending_settings.selected_resolution;
+        self.server_port = self.pending_settings.server_port.clone();
+        
+        if let Some(resolution) = self.resolutions.get(self.selected_resolution) {
+            ctx.send_viewport_cmd(egui::ViewportCommand::InnerSize(
+                egui::Vec2::new(resolution.0 as f32, resolution.1 as f32)
+            ));
+        }
+        
+        ctx.send_viewport_cmd(egui::ViewportCommand::Fullscreen(self.fullscreen));
+    }
+
+    fn enter_settings(&mut self) {
+        self.pending_settings.fullscreen = self.fullscreen;
+        self.pending_settings.selected_resolution = self.selected_resolution;
+        self.pending_settings.server_port = self.server_port.clone();
+        self.state = AppState::Settings;
+    }
+}
+
+impl eframe::App for ChessApp {
+    fn update(&mut self, ctx: &egui::Context, frame: &mut eframe::Frame) {
+        match self.state {
+            AppState::MainMenu => {
+                egui::CentralPanel::default().show(ctx, |ui| {
+                    ui.vertical_centered(|ui| {
+                        ui.heading("♞ Knightly ♞");
+                        ui.add_space(30.0);
+
+                        if ui.add_sized([300.0, 60.0], egui::Button::new("Play")).clicked() {
+                            self.state = AppState::InGame;
+                        }
+                        ui.add_space(8.0);
+                        
+                        if ui.add_sized([300.0, 60.0], egui::Button::new("Settings")).clicked() {
+                            self.enter_settings();
+                        }
+                        ui.add_space(8.0);
+                        
+                        if ui
+                            .add_sized([300.0, 60.0], egui::Button::new("Quit"))
+                            .clicked()
+                        {
+                            std::process::exit(0);
+                        }
+                    });
+                });
+            }
+
+            AppState::Settings => {
+                egui::CentralPanel::default().show(ctx, |ui| {
+                    ui.vertical_centered(|ui| {
+                        ui.heading("Settings");
+                        ui.add_space(30.0);
+
+                        // Fullscreen toggle
+                        ui.horizontal(|ui| {
+                            ui.label("Fullscreen:");
+                            if ui.checkbox(&mut self.pending_settings.fullscreen, "").changed() {
+                                // If enabling fullscreen, we might want to disable resolution selection
+                            }
+                        });
+                        ui.add_space(10.0);
+
+                        // Resolution dropdown
+                        ui.horizontal(|ui| {
+                            ui.label("Resolution:");
+                            egui::ComboBox::new("resolution_combo", "")
+                                .selected_text(format!(
+                                    "{}x{}",
+                                    self.resolutions[self.pending_settings.selected_resolution].0,
+                                    self.resolutions[self.pending_settings.selected_resolution].1
+                                ))
+                                .show_ui(ui, |ui| {
+                                    for (i, &(width, height)) in self.resolutions.iter().enumerate() {
+                                        ui.selectable_value(
+                                            &mut self.pending_settings.selected_resolution,
+                                            i,
+                                            format!("{}x{}", width, height),
+                                        );
+                                    }
+                                });
+                        });
+                        ui.add_space(10.0);
+
+                        // Server port input field
+                        ui.horizontal(|ui| {
+                            ui.label("Local Server Port:");
+                            ui.add(egui::TextEdit::singleline(&mut self.pending_settings.server_port)
+                                .desired_width(100.0)
+                                .hint_text("8080"));
+                        });
+                        ui.add_space(30.0);
+
+                        // Apply and Cancel buttons
+                        ui.horizontal(|ui| {
+                            if ui.add_sized([140.0, 40.0], egui::Button::new("Apply")).clicked() {
+                                self.apply_settings(ctx);
+                                self.state = AppState::MainMenu;
+                            }
+                            
+                            if ui.add_sized([140.0, 40.0], egui::Button::new("Cancel")).clicked() {
+                                self.state = AppState::MainMenu;
+                            }
+                        });
+                    });
+                });
+            }
+
+            AppState::InGame => {
+                egui::TopBottomPanel::top("menu_bar").show(ctx, |ui| {
+                    ui.horizontal(|ui| {
+                        if ui.button("Main Menu").clicked() {
+                            self.state = AppState::MainMenu;
+                        }
+                        if ui.button("Settings").clicked() {
+                            self.enter_settings();
+                        }
+                        if ui.button("New Game").clicked() {
+                            *self = ChessApp::default();
+                            self.state = AppState::InGame;
+                        }
+                        ui.separator();
+                        ui.label(format!("Turn: {:?}", self.turn));
+                    });
+                });
+                
+                egui::CentralPanel::default().show(ctx, |ui| {
+                    ui.vertical_centered(|ui| {
+                        let full_avail = ui.available_rect_before_wrap();
+                        let board_tile = (full_avail.width().min(full_avail.height())) / 8.0;
+                        let board_size = board_tile * 8.0;
+                        
+                        // Create a child UI at the board position
+                        let (response, painter) = ui.allocate_painter(
+                            egui::Vec2::new(board_size, board_size),
+                            egui::Sense::click()
+                        );
+                        
+                        let board_rect = egui::Rect::from_center_size(
+                            full_avail.center(),
+                            egui::vec2(board_size, board_size)
+                        );
+                        
+                        // Draw the chess board
+                        let tile_size = board_size / 8.0;
+                        for row in 0..8 {
+                            for col in 0..8 {
+                                let color = if (row + col) % 2 == 0 {
+                                    egui::Color32::from_rgb(100, 97, 97)
+                                } else {
+                                    egui::Color32::from_rgb(217, 217, 217)
+                                };
+                                
+                                let rect = egui::Rect::from_min_size(
+                                    egui::Pos2::new(
+                                        board_rect.min.x + col as f32 * tile_size,
+                                        board_rect.min.y + row as f32 * tile_size
+                                    ),
+                                    egui::Vec2::new(tile_size, tile_size)
+                                );
+                                
+                                painter.rect_filled(rect, 0.0, color);
+                                
+                                // Draw piece
+                                let piece = self.board[row][col];
+                                if piece != Piece::Empty {
+                                    let symbol = piece.symbol();
+                                    let font_id = egui::FontId::proportional(tile_size * 0.75);
+                                    painter.text(
+                                        rect.center(),
+                                        egui::Align2::CENTER_CENTER,
+                                        symbol,
+                                        font_id,
+                                        if matches!(piece, Piece::King('w') | Piece::Queen('w') | Piece::Rook('w') | Piece::Bishop('w') | Piece::Knight('w') | Piece::Pawn('w')) {
+                                            egui::Color32::WHITE
+                                        } else {
+                                            egui::Color32::BLACK
+                                        }
+                                    );
+                                }
+                                
+                                // Draw selection highlight
+                                if self.selected == Some((row, col)) {
+                                    painter.rect_stroke(
+                                        rect, 
+                                        0.0, 
+                                        egui::Stroke::new(3.0, egui::Color32::RED),
+                                        egui::StrokeKind::Inside
+                                    );
+                                }
+                                
+                                // Handle clicks
+                                if ui.ctx().input(|i| i.pointer.primary_clicked()) {
+                                    let click_pos = ui.ctx().input(|i| i.pointer.interact_pos()).unwrap();
+                                    if rect.contains(click_pos) {
+                                        self.handle_click(row, col);
+                                    }
+                                }
+                            }
+                        }
+                    });
+                });
+            }
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    #[test]
+    fn test_initial_board_setup() {
+        let app = ChessApp::default();
+        assert!(matches!(app.board[0][0], Piece::Rook('b')));
+        assert!(matches!(app.board[7][0], Piece::Rook('w')));
+
+        assert!(matches!(app.board[1][0], Piece::Pawn('b')));
+        assert!(matches!(app.board[6][0], Piece::Pawn('w')));
+    }
+    
+    #[test]
+    fn test_piece_symbols() {
+        assert_eq!(Piece::King('w').symbol(), "♔");
+        assert_eq!(Piece::King('b').symbol(), "♚");
+        assert_eq!(Piece::Empty.symbol(), "");
+    }
+    
+    #[test]
+    fn test_piece_selection() {
+        let mut app = ChessApp::default();
+        app.handle_click(6, 0);
+        assert_eq!(app.selected, Some((6, 0)));
+        app.handle_click(6, 0);
+        assert_eq!(app.selected, None);
+    }
+    
+    #[test]
+    fn test_piece_movement() {
+        let mut app = ChessApp::default();
+        // Select and move a piece
+        app.handle_click(6, 0); // Select white pawn
+        app.handle_click(5, 0); // Move to empty square
+        assert_eq!(app.board[6][0], Piece::Empty);
+        assert!(matches!(app.board[5][0], Piece::Pawn('w')));
+    }
+
+    #[test]
+    fn test_turn_switching() {
+        let mut app = ChessApp::default();
+        assert_eq!(app.turn, Turn::White);
+        app.handle_click(6, 0); // White selects
+        app.handle_click(5, 0); // White moves
+        assert_eq!(app.turn, Turn::Black); // Should now be Black's turn
+    }
+    
+    #[test]
+    fn test_server_port_default() {
+        let app = ChessApp::default();
+        assert_eq!(app.server_port, "8080");
+    }
 }