htamas1210/Knightly
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases 20 Wiki Activity

implemented the generation of LUT: PAWN_ATTACK_MAP

Browse Source
This commit is contained in:
Varga Dávid Lajos
2025-11-11 10:32:41 +01:00
parent 4eb4bc1348
commit b6cdf5b778
1 changed files with 15 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
engine/src/bitboard/attackmaps.rs
View File

@@ -15,7 +15,7 @@ const GH_FILE: u64 = 0xC0C0_C0C0_C0C0_C0C0;
// KING_ATTACK_MAP[<square_index>]
pub static KING_ATTACK_MAP: Lazy<[u64; 64]> = Lazy::new(|| {
let mut table: [u64; 64] = [0u64; 64];
for sq in 0..64 {
let king: u64 = 1 << sq;
@@ -29,7 +29,18 @@ pub static KING_ATTACK_MAP: Lazy<[u64; 64]> = Lazy::new(|| {
// PAWN_ATTACK_MAP[<square_index>][<side>]
pub static PAWN_ATTACK_MAP: Lazy<[[u64; 2]; 64]> = Lazy::new(|| {
let table: [[u64; 2]; 64] = [[0u64; 2]; 64];
let mut table: [[u64; 2]; 64] = [[0u64; 2]; 64];
for sq in 0..64 {
let pawn: u64 = 1 << sq;
table[sq][0] |= (pawn << 9) & !A_FILE;
table[sq][0] |= (pawn << 7) & !H_FILE;
}
for sq in 0..64 {
let pawn: u64 = 1 << sq;
table[sq][1] |= (pawn >> 9) & !H_FILE;
table[sq][1] |= (pawn >> 7) & !A_FILE;
}
return table;
});
@@ -121,8 +132,8 @@ mod tests {
// test setup for white center
let white_center_indexes: [usize; 2] = [11, 12];
let white_center_attack_maps: [u64; 2] = [
(1 << 19) | (1 << 21),
(1 << 20) | (1 << 22)
(1 << 18) | (1 << 20),
(1 << 19) | (1 << 21)
];
// tests for white center
for index in 0..2 {