private void AssignFirstZobristKey()
{
var side = (int)board.Side == 1 ? 0 : 1;
foreach (var piece in board.GetPieces())
{
zobristKey ^= pieces[side, piece.ToInt, piece.From.Rank, piece.From.File];
}
zobristKey ^= whiteCastle[(int)board.WhiteCastle];
zobristKey ^= blackCastle[(int)board.BlackCastle];
zobristKey ^= enPassant[board.EnPassantSquare.Rank, board.EnPassantSquare.File];
zobristKey ^= this.side;
}
public static int Evaluate(Board board)
{
return((int)board.Side * board.GetPieces().Sum(p => p.Evaluation()));
}
