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Castle hashing: avoid any static calculation #591

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Castle hashing: avoid any static calculation #591

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10 changes: 5 additions & 5 deletions src/Lynx/ZobristTable.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -11,11 +11,6 @@ public static class ZobristTable
{
private static readonly long[,] _table = Initialize();

private static readonly long WK_Hash = _table[(int)BoardSquare.a8, (int)Piece.p];
private static readonly long WQ_Hash = _table[(int)BoardSquare.b8, (int)Piece.p];
private static readonly long BK_Hash = _table[(int)BoardSquare.c8, (int)Piece.p];
private static readonly long BQ_Hash = _table[(int)BoardSquare.d8, (int)Piece.p];

[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static long PieceHash(int boardSquare, int piece) => _table[boardSquare, piece];

Expand Down Expand Up @@ -64,6 +59,11 @@ public static long SideHash()
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static long CastleHash(byte castle)
{
var WK_Hash = _table[(int)BoardSquare.a8, (int)Piece.p];
var WQ_Hash = _table[(int)BoardSquare.b8, (int)Piece.p];
var BK_Hash = _table[(int)BoardSquare.c8, (int)Piece.p];
var BQ_Hash = _table[(int)BoardSquare.d8, (int)Piece.p];

return castle switch
{
0 => 0, // - | -
Expand Down
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