/// <summary>
/// Detects Checkmate, Stalemate or Draw conditions.
/// </summary>
/// <returns>True if no legal moves, or only kings left.</returns>
public bool detectCheckmate()
{
bool wkingonly = this.Board.Pieces[Player.WHITE].Count == 1 && this.Board.Grid[this.Board.Pieces[Player.WHITE][0].number][this.Board.Pieces[Player.WHITE][0].letter].piece == Piece.KING;
bool bkingonly = this.Board.Pieces[Player.BLACK].Count == 1 && this.Board.Grid[this.Board.Pieces[Player.BLACK][0].number][this.Board.Pieces[Player.BLACK][0].letter].piece == Piece.KING;
if (!LegalMoveSet.hasMoves(this.Board, this.Turn))
{
if (LegalMoveSet.isCheck(this.Board, this.Turn))
{
this.m_UI.LogMove("Checkmate!\n");
this.m_UI.SetStatus(false, ((this.Turn == Player.WHITE) ? "Black" : "White") + " wins!");
}
else
{
this.m_UI.LogMove("Stalemate!\n");
}
return(true);
}
else if (wkingonly && bkingonly)
{
this.m_UI.LogMove("Draw.\n");
return(true);
}
return(false);
}
private void MakeMove(move_t m)
{
// start move log output
string move = (this.Turn == Player.WHITE) ? "W" : "B";
move += ":\t";
// piece
switch (this.Board.Grid[m.from.number][m.from.letter].piece)
{
case Piece.PAWN:
move += "P";
break;
case Piece.ROOK:
move += "R";
break;
case Piece.KNIGHT:
move += "k";
break;
case Piece.BISHOP:
move += "B";
break;
case Piece.QUEEN:
move += "Q";
break;
case Piece.KING:
move += "K";
break;
}
// kill
if (this.Board.Grid[m.to.number][m.to.letter].piece != Piece.NONE || LegalMoveSet.isEnPassant(this.Board, m))
{
move += "x";
}
// letter
switch (m.to.letter)
{
case 0: move += "a"; break;
case 1: move += "b"; break;
case 2: move += "c"; break;
case 3: move += "d"; break;
case 4: move += "e"; break;
case 5: move += "f"; break;
case 6: move += "g"; break;
case 7: move += "h"; break;
}
// number
move += (m.to.number + 1).ToString();
// update board / make actual move
this.Board = LegalMoveSet.move(this.Board, m);
// if that move put someone in check
if (LegalMoveSet.isCheck(this.Board, (Turn == Player.WHITE) ? Player.BLACK : Player.WHITE))
{
move += "+";
}
// show log
this.m_UI.LogMove(move + "\n");
}