public static ulong PseudomoveBitboard(int piece, int[] board)
{
PieceType pt = Util.GetPieceType(piece);
switch (pt)
{
case PieceType.Pawn:
return(PawnMoveGenerator.PseudomoveBitboard(piece, board));
case PieceType.Night:
return(KnightMoveGenerator.PseudomoveBitboard(piece));
case PieceType.Bishop:
return(BishopMoveGenerator.PseudomoveBitboard(piece));
case PieceType.Rook:
return(RookMoveGenerator.PseudomoveBitboard(piece));
case PieceType.Queen:
return(QueenMoveGenerator.PseudomoveBitboard(piece));
case PieceType.King:
return(KingMoveGenerator.PseudomoveBitboard(piece));
default:
break;
}
return(0);
}
//generate bitboard of moves
public static ulong PseudomoveBitboard(int piece, int[] board)
{
bool isWhite = Util.IsWhite(piece);
int position = Util.GetPieceOffset(piece);
int positionX = Util.GetXForPosition(position);
int positionY = Util.GetYForPosition(position);
ulong result = 0;
ulong one = 1;
if (isWhite)
{
if (positionY < 6)
{
if (board[position + 8] == 0)
{
result |= (one << (position + 8));
}
//captures
if (positionX > 0)
{
result |= (one << (position + 7));
}
if (positionX < 7)
{
result |= (one << (position + 9));
}
//initial double move
if (positionY == 1)
{
result |= (one << (position + (2 * 8)));
}
}
else if (positionY == 6)
{
//pawn promotion
result |= QueenMoveGenerator.PseudomoveBitboard((PieceTypeFENMap.PieceValue('Q') + position + 8));
if (positionX > 0)
{
result |= QueenMoveGenerator.PseudomoveBitboard((PieceTypeFENMap.PieceValue('Q') + position + 7));
}
if (positionX < 7)
{
result |= QueenMoveGenerator.PseudomoveBitboard((PieceTypeFENMap.PieceValue('Q') + position + 9));
}
}
}
else
{
if (positionY > 1)
{
if (board[position - 8] == 0)
{
result |= (one << (position - 8));
}
//captures
if (positionX < 7)
{
result |= (one << (position - 7));
}
if (positionX > 0)
{
result |= (one << (position - 9));
}
//initial double move
if (positionY == 6)
{
result |= (one << (position - (2 * 8)));
}
}
else if (positionY == 1)
{
//pawn promotion
result |= QueenMoveGenerator.PseudomoveBitboard((PieceTypeFENMap.PieceValue('q') + position - 8));
if (positionX < 7)
{
result |= QueenMoveGenerator.PseudomoveBitboard((PieceTypeFENMap.PieceValue('q') + position - 7));
}
if (positionX > 0)
{
result |= QueenMoveGenerator.PseudomoveBitboard((PieceTypeFENMap.PieceValue('q') + position - 9));
}
}
}
return(result);
}