/// <summary>
/// Moves the the given piece in the bitboards. May want to consider moving all of
/// the movePiece logic into the ChessPosition.removePiece function. This routine
/// basically mimics the ChessBitboard.removePiece and ChessBitboard.addPiece so maybe
/// simply call those routines to to simplify the logic. Currenty only being done
/// for a small optimization gain.
/// </summary>
/// <param name="piece">Piece we are deleting, note that the ChessPostion
/// class ignores the color of the piece as basically it is color blind.</param>
/// <param name="square"></param>
/// <param name="Pieces">Current bitboards to update.</param>
public void movePiece(Chess.Pieces piece, BitboardSquare from, BitboardSquare to)
{
// Move the piece.
removePiece(piece, from.getSquareMask());
addPiece(piece, to.getSquareMask());
// Remove any prevoious Enpasant.
Enpasant = 0x00;
// See if this move puts a pawn in danger of Enpasant
if (piece == Chess.Pieces.BPAWN || piece == Chess.Pieces.WPAWN)
{
if (isPotentialEnpasant(from.getSquareMask(), to.getSquareMask()))
{
// Set square of pawn susceptible to enpasant attack.
Enpasant = to.getSquareMask();
}
}
Board = (Board & (~from.getSquareMask())) | to.getSquareMask();
// Update attacker rotated boards:
Bitboard maskFrom = from.getA8H1Mask(); // getBitSquare(coFrom.A8H1Square);
Bitboard maskTo = to.getA8H1Mask(); //getBitSquare(coTo.A8H1Square);
RotatedA8H1 = (RotatedA8H1 & (~maskFrom)) | maskTo;
maskFrom = from.getA1H8Mask(); //getBitSquare(coFrom.A1H8Square);
maskTo = to.getA1H8Mask(); //getBitSquare(coTo.A1H8Square);
RotatedA1H8 = (RotatedA1H8 & (~maskFrom)) | maskTo;
maskFrom = from.getR90Mask(); //getBitSquare(coFrom.R90Square);
maskTo = to.getR90Mask(); //getBitSquare(coTo.R90Square);
RotatedR90 = (RotatedR90 & (~maskFrom)) | maskTo;
}
/// <summary>
/// Adds the given piece to the bitboards. May want to consider moving all of
/// the addPiece logic into the ChessPosition.removePiece function.
/// </summary>
/// <param name="piece">Piece we are deleting, note that the ChessPostion
/// class ignores the color of the piece as basically it is color blind.</param>
/// <param name="Pieces">Current bitboards to update.</param>
public void addPiece(Chess.Pieces piece, BitboardSquare to)
{
// Add the piece to the piece board.
addPiece(piece, to.getSquareMask());
// Update main board.
Board = Board | to.getSquareMask();
// Update rotated boards:
Bitboard maskTo = to.getA8H1Mask(); // getBitSquare(coTo.A8H1Square);
RotatedA8H1 = RotatedA8H1 | maskTo;
maskTo = to.getA1H8Mask(); // getBitSquare(coTo.A1H8Square);
RotatedA1H8 = RotatedA1H8 | maskTo;
maskTo = to.getR90Mask(); // getBitSquare(coTo.R90Square);
RotatedR90 = RotatedR90 | maskTo;
}
/// <summary>
/// Removes the given piece from the bitboards. May want to consider moving all of
/// the removePiece logic into the ChessPosition.removePiece function.
/// </summary>
/// <param name="piece">Piece we are deleting, note that the ChessPostion
/// class ignores the color of the piece as basically it is color blind.</param>
/// <param name="square"></param>
/// <param name="Pieces"></param>
public void removePiece(Chess.Pieces piece, BitboardSquare square)
{
// Get the squares.
// BitboardSquare bbSquare = new BitboardSquare(square);
Bitboard mask = square.getSquareMask(); // getBitSquare(bbSquare.Square);
removePiece(piece, mask);
Board = Board & ~mask;
// Update rotated boards:
mask = square.getA8H1Mask(); // getBitSquare(bbSquare.A8H1Square);
RotatedA8H1 = RotatedA8H1 & ~mask;
mask = square.getA1H8Mask(); // getBitSquare(bbSquare.A1H8Square);
RotatedA1H8 = RotatedA1H8 & ~mask;
mask = square.getR90Mask(); // getBitSquare(bbSquare.R90Square);
RotatedR90 = RotatedR90 & ~mask;
}
