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implemented the generation of LUT: KNIGHT_ATTACK_MAP

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Varga Dávid Lajos
2025-11-11 10:33:51 +01:00
parent b6cdf5b778
commit 1af497f063
1 changed files with 12 additions and 1 deletions
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13
engine/src/bitboard/attackmaps.rs
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@@ -46,7 +46,18 @@ pub static PAWN_ATTACK_MAP: Lazy<[[u64; 2]; 64]> = Lazy::new(|| {
// KNIGHT_ATTACK_MAP[<square_index>]
pub static KNIGHT_ATTACK_MAP: Lazy<[u64; 64]> = Lazy::new(|| {
let table: [u64; 64] = [0u64; 64];
let mut table: [u64; 64] = [0u64; 64];
for sq in 0..64 {
let knight: u64 = 1 << sq;
let far_left_attacks: u64 = knight << 6 | knight >> 10;
let near_left_attacks: u64 = knight << 15 | knight >> 17;
let far_right_attacks: u64 = knight << 10 | knight >> 6;
let near_right_attacks: u64 = knight << 17 | knight >> 15;
table[sq] = (far_left_attacks & !GH_FILE) | (far_right_attacks & !AB_FILE) | (near_left_attacks & !H_FILE) | (near_right_attacks & !A_FILE);
}
return table;
});