added and used method bitboard::makemove::captures::make_capture

engine/src/bitboard/makemove.rs

@@ -16,7 +16,7 @@ impl Board {
         self.make_quiet(played_move);
       }
       BitMoveType::Capture => {
-        
+        self.make_capture(played_move);
       }
       BitMoveType::Castle => {
         

engine/src/bitboard/makemove/captures.rs

@@ -1,5 +1,82 @@
 use super::*;
 
 impl Board {
+  pub fn make_capture(&mut self, played_move: &BitMove) {
+    let main_from: usize = played_move.from_square() as usize;
+    let main_to: usize = played_move.to_square() as usize;
+    let main_piece: usize = self.piece_board(main_from as u8) as usize;
+    let friendly_occupancy = main_piece/6;
 
+    let color_offset = self.side_to_move * 6;
+    let castling_offset = 2 - 2 * self.side_to_move as usize;
+    let castling_rights = self.castling_rights >> castling_offset;
+
+    let mut taken_piece = 0u8;
+
+    taken_piece = self.piece_board(main_to as u8);
+    let secondary_piece = taken_piece as usize;
+    let secondary_from = main_to;
+
+    let opponent_castling_offset = 2 * self.side_to_move as usize;
+    let opponent_castling_rights = self.castling_rights >> opponent_castling_offset;
+
+    let opponent_occupancy = 1 - self.side_to_move as usize;
+        
+    self.bitboards[main_piece] &= !(1 << main_from);
+    self.occupancy[friendly_occupancy] &= !(1 << main_from);
+    self.piece_board[main_from] = Self::EMPTY_SQUARE;
+
+    self.bitboards[secondary_piece] &= !(1 << secondary_from);
+    self.occupancy[opponent_occupancy] &= !(1 << secondary_from);
+    self.piece_board[secondary_from] = Self::EMPTY_SQUARE;
+
+    if opponent_castling_rights != 0
+      && secondary_piece == 9 - color_offset as usize{
+
+      let back_rank_offset = 56 - 56 * self.side_to_move as usize;
+      if opponent_castling_rights & 0b01 != 0
+        && secondary_from == back_rank_offset {
+          self.castling_rights &= !(1 << opponent_castling_offset);
+      }
+      else if opponent_castling_rights & 0b10 != 0
+        && secondary_from == 7 + back_rank_offset {
+          self.castling_rights &= !(2 << opponent_castling_offset);
+      }
+    }
+
+    if let Some(promotion_piece) = played_move.promotion_piece() {
+      let promotion_piece = (color_offset + promotion_piece) as usize;
+      self.bitboards[promotion_piece] |= 1 << main_to;
+      self.occupancy[friendly_occupancy] |= 1 << main_to;
+      self.piece_board[main_to] = promotion_piece as u8;
+    }
+    else {
+      self.bitboards[main_piece] |= 1 << main_to;
+      self.occupancy[friendly_occupancy] |= 1 << main_to;
+      self.piece_board[main_to] = main_piece as u8;
+
+      if main_piece == 5 + color_offset as usize 
+            && castling_rights != 0 {
+        if castling_rights & 0b1 != 0 {
+          self.castling_rights &= !(1 << castling_offset);
+        }
+        if castling_rights & 0b10 != 0 {
+          self.castling_rights &= !(2 << castling_offset);
+        }
+      }
+      else if main_piece == 3 + color_offset as usize
+            && castling_rights != 0 {
+        let back_rank_offset = 56 * self.side_to_move as usize;
+
+        if castling_rights & 0b10 != 0
+              && main_from == 7 + back_rank_offset {
+          self.castling_rights &= !(2 << castling_offset);
+        }
+        else if castling_rights & 0b1 != 0
+              && main_from == back_rank_offset {
+          self.castling_rights &= !(1 << castling_offset);
+        }
+      }
+    }
+  }
 }