// Return false if move is illegal
public bool MakeMove(int oldPos, int destPos)
{
PieceType pieceType = S[oldPos].PieceType;
// Handle queening and castle prevention
if (WhosMove == Colour.Black)
{
if (pieceType == PieceType.Pawn)
{
if (Rank(destPos) == 0)
S[oldPos] = new Piece(Colour.Black, PieceType.Queen);
if (destPos == oldPos - 16) // set en-passant square
EpSquare = destPos + 8;
}
else if (pieceType == PieceType.King)
{
BlackCanQCastle = false;
BlackCanKCastle = false;
if (destPos == oldPos + 2) //Q-side castle move rook
{
S[63] = null;
S[60] = new Piece(Colour.Black, PieceType.Rook);
}
if (destPos == oldPos - 2) //K-side castle move rook
{
S[56] = null;
S[58] = new Piece(Colour.Black, PieceType.Rook);
}
}
else if (pieceType == PieceType.Rook && oldPos == 56)
BlackCanKCastle = false;
else if (pieceType == PieceType.Rook && oldPos == 63)
BlackCanQCastle = false;
}
if (WhosMove == Colour.White)
{
if (pieceType == PieceType.Pawn)
{
if (Rank(destPos) == 7)
S[oldPos] = new Piece(Colour.White, PieceType.Queen);
if (destPos == oldPos + 16) // set en-passant square
EpSquare = destPos - 8;
}
if (pieceType == PieceType.King)
{
WhiteCanQCastle = false;
WhiteCanKCastle = false;
if (destPos == oldPos + 2) //Q-side castle move rook
{
S[7] = null;
S[4] = new Piece(Colour.White, PieceType.Rook);
}
if (destPos == oldPos - 2) //K-side castle move rook
{
S[0] = null;
S[2] = new Piece(Colour.White, PieceType.Rook);
}
}
if (pieceType == PieceType.Rook && oldPos == 0)
WhiteCanKCastle = false;
if (pieceType == PieceType.Rook && oldPos == 7)
WhiteCanQCastle = false;
}
if (destPos == m_OldBoard.EpSquare && pieceType == PieceType.Pawn)
{
if (WhosMove == Colour.White)
S[m_OldBoard.EpSquare - 8] = null;
if (WhosMove == Colour.Black)
S[m_OldBoard.EpSquare + 8] = null;
}
S[destPos] = new Piece(S[oldPos]);
S[oldPos] = null;
if (KingIsInCheck) return false;
this.WhosMove = m_OldBoard.WhosMove == Colour.White ? Colour.Black : Colour.White;
return true;
}
public Board(Board currentBoard)
{
this.BlackCanQCastle = currentBoard.BlackCanQCastle;
this.BlackCanKCastle = currentBoard.BlackCanKCastle;
this.WhiteCanQCastle = currentBoard.WhiteCanQCastle;
this.WhiteCanKCastle = currentBoard.WhiteCanKCastle;
this.WhosMove = currentBoard.WhosMove;
for (int i = 0; i < 64; i++)
{
if (currentBoard.S[i] != null)
S[i] = new Piece(currentBoard.S[i]);
}
m_OldBoard = currentBoard;
}
public Piece(Piece piece)
: this(piece.Colour, piece.PieceType)
{
}
