moritz/chess-engine
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

fixed eval wrong table orientation

Browse source
This commit is contained in:
Moritz Eigenauer 2025-11-18 13:03:52 +01:00
parent 32be42e283
commit 0c1055d7aa
2 changed files with 19 additions and 17 deletions
Download patch file Download diff file Expand all files Collapse all files

36
src/eval/piece_square_tables.rs
View file

@ -130,47 +130,49 @@ pub const EG_KING_TABLE: [i32; 64] = [
-53, -34, -21, -11, -28, -14, -24, -43
];
/// Helper function to reverse the table at compile time
const fn reverse_psqt(table: [i32; 64]) -> [i32; 64] {
let mut reversed = [0; 64];
/// Helper function to mirror the table vertically at compile time
const fn mirror_psqt(table: [i32; 64]) -> [i32; 64] {
let mut mirrored = [0; 64];
let mut i = 0;
while i < 64 {
reversed[i] = table[63 - i];
// XOR 56 maps rank 1 to 8, 2 to 7 etc, keeping files intact
mirrored[i] = table[i ^ 56];
i += 1;
}
reversed
mirrored
}
// Type signature: [Piece (6)] -> [Color (2)] -> [Phase (2)] -> [Square (64)]
pub const PSQT: [[[[i32; 64]; 2]; 2]; 6] = [
// 1. PAWN
[
[MG_PAWN_TABLE, EG_PAWN_TABLE], // White
[reverse_psqt(MG_PAWN_TABLE), reverse_psqt(EG_PAWN_TABLE)] // Black (Reversed)
[mirror_psqt(MG_PAWN_TABLE), mirror_psqt(EG_PAWN_TABLE)], // White (Muss geflippt werden!)
[MG_PAWN_TABLE, EG_PAWN_TABLE] // Black (Ist bereits korrekt für schwarze Indices)
],
// 2. KNIGHT
[
[MG_KNIGHT_TABLE, EG_KNIGHT_TABLE], // White
[reverse_psqt(MG_KNIGHT_TABLE), reverse_psqt(EG_KNIGHT_TABLE)]// Black (Reversed)
[mirror_psqt(MG_KNIGHT_TABLE), mirror_psqt(EG_KNIGHT_TABLE)], // White
[MG_KNIGHT_TABLE, EG_KNIGHT_TABLE] // Black
],
// 3. BISHOP
[
[MG_BISHOP_TABLE, EG_BISHOP_TABLE], // White
[reverse_psqt(MG_BISHOP_TABLE), reverse_psqt(EG_BISHOP_TABLE)]// Black (Reversed)
[mirror_psqt(MG_BISHOP_TABLE), mirror_psqt(EG_BISHOP_TABLE)], // White
[MG_BISHOP_TABLE, EG_BISHOP_TABLE] // Black
],
// 4. ROOK
[
[MG_ROOK_TABLE, EG_ROOK_TABLE], // White
[reverse_psqt(MG_ROOK_TABLE), reverse_psqt(EG_ROOK_TABLE)] // Black (Reversed)
[mirror_psqt(MG_ROOK_TABLE), mirror_psqt(EG_ROOK_TABLE)], // White
[MG_ROOK_TABLE, EG_ROOK_TABLE] // Black
],
// 5. QUEEN
[
[MG_QUEEN_TABLE, EG_QUEEN_TABLE], // White
[reverse_psqt(MG_QUEEN_TABLE), reverse_psqt(EG_QUEEN_TABLE)] // Black (Reversed)
[mirror_psqt(MG_QUEEN_TABLE), mirror_psqt(EG_QUEEN_TABLE)], // White
[MG_QUEEN_TABLE, EG_QUEEN_TABLE] // Black
],
// 6. KING
[
[MG_KING_TABLE, EG_KING_TABLE], // White
[reverse_psqt(MG_KING_TABLE), reverse_psqt(EG_KING_TABLE)] // Black (Reversed)
[mirror_psqt(MG_KING_TABLE), mirror_psqt(EG_KING_TABLE)], // White
[MG_KING_TABLE, EG_KING_TABLE] // Black
],
];