public void revertStep()
{
if (board.revertStep(true))
{
ismarked = false;
whiteTurn = !whiteTurn;
if (playerBoth)
{
playerWhite = !playerWhite;
}
possibleMoves = Rules.checkMoves(board, whiteTurn, true);
checkCheck();
}
}
private static int minimax(Board board, int depth, bool isWhite, int alpha, int beta)
{
if (depth == 0)
{
checkedMoves++;
return(evalBoard(board));
}
List <Move> moves = Rules.checkMoves(board, isWhite, true);
if (isWhite)
{
int bestMove = -99999;
for (int i = 0; i < moves.Count; i++)
{
board.move(moves[i], false);
bestMove = Math.Max(bestMove, minimax(board, depth - 1, !isWhite, alpha, beta));
board.revertStep(false);
alpha = Math.Max(alpha, bestMove);
if (beta <= alpha)
{
return(bestMove);
}
}
return(bestMove);
}
else
{
int bestMove = 99999;
for (int i = 0; i < moves.Count; i++)
{
board.move(moves[i], false);
bestMove = Math.Min(bestMove, minimax(board, depth - 1, !isWhite, alpha, beta));
board.revertStep(false);
beta = Math.Min(beta, bestMove);
if (beta <= alpha)
{
return(bestMove);
}
}
return(bestMove);
}
}
public void reset()
{
board.reset();
ismarked = false;
whiteTurn = true;
check = false;
checkmate = false;
draw = false;
if (playerBoth)
{
playerWhite = true;
}
possibleMoves = Rules.checkMoves(board, whiteTurn, true);
if (playerWhite != whiteTurn)
{
Opponent.move(board, possibleMoves, whiteTurn, difficulty);
whiteTurn = !whiteTurn;
possibleMoves = Rules.checkMoves(board, whiteTurn, true);
}
}
public void tryMove(int x, int y)
{
if (checkmate)
{
return;
}
if (posIsPlayer(x, y))
{
ismarked = false;
}
if (ismarked)
{
for (int i = 0; i < possiblePos.Count; i++)
{
if (possiblePos[i].x == x && possiblePos[i].y == y)
{
board.move(new Move(marked, new Position(y, x)), true);
whiteTurn = !whiteTurn;
if (playerBoth)
{
playerWhite = !playerWhite;
}
possibleMoves = Rules.checkMoves(board, whiteTurn, true);
if (playerWhite != whiteTurn && possibleMoves.Count > 0)
{
Opponent.move(board, possibleMoves, whiteTurn, difficulty);
whiteTurn = !whiteTurn;
possibleMoves = Rules.checkMoves(board, whiteTurn, true);
}
checkCheck();
break;
}
}
ismarked = false;
}
else
{
int start = 7;
if (playerWhite)
{
start = 1;
}
if ((int)board.pieces[y, x] >= start && (int)board.pieces[y, x] < start + 6)
{
possiblePos.Clear();
for (int i = 0; i < possibleMoves.Count; i++)
{
if (possibleMoves[i].source.x == x && possibleMoves[i].source.y == y)
{
possiblePos.Add(possibleMoves[i].target);
}
}
if (possiblePos.Count > 0)
{
ismarked = true;
marked.x = x;
marked.y = y;
}
}
}
}
