private bool IsCheckMate(Color color)
{
ChessPiece[,] board = GetBoard;
King king = GetKing(color);
for (int i = 0; i < board.GetLength(0); i++)
{
for (int j = 0; j < board.GetLength(1); j++)
{
ChessPiece chessPiece = board[i, j];
if (chessPiece != null)
{
if (chessPiece.GetColor == king.GetColor)
{
foreach (Point move in chessPiece.GetValidMoves())
{
if (chessPiece.MoveResolvesCheck(color, move))
{
return(false);
}
}
}
}
}
}
return(true);
}
private void ChooseChessPiece(object sender, MouseButtonEventArgs e)
{
Border border = (Border)((Image)sender).Parent;
Border highlighted = (Border)mainWindow.FindName("highlighted");
ChessPiece chessPiece = GetBoard[Grid.GetRow(border), Grid.GetColumn(border)];
if (highlighted != null)
{
ChessPiece highlightedChessPiece = GetBoard[Grid.GetRow(highlighted), Grid.GetColumn(highlighted)];
List <Point> highlightedValidMoves = null;
if (!KingIsChecked(currentTurnColor))
{
highlightedValidMoves = highlightedChessPiece.GetValidMoves();
}
else
{
highlightedValidMoves = highlightedChessPiece.GetValidMovesIfKingIsChecked();
}
ColorTile(highlighted);
UnshowValidMoves(highlightedValidMoves);
mainWindow.UnregisterName(highlighted.Name);
}
if (chessPiece.GetColor == currentTurnColor)
{
border.Name = "highlighted";
mainWindow.RegisterName(border.Name, border);
border.Background = Brushes.Yellow;
List <Point> validMoves = null;
if (!KingIsChecked(currentTurnColor))
{
validMoves = chessPiece.GetValidMoves();
}
else
{
validMoves = chessPiece.GetValidMovesIfKingIsChecked();
}
ShowValidMoves(validMoves);
}
}
public bool KingIsChecked(Color color)
{
ChessPiece[,] board = GetBoard;
King king = GetKing(color);
Point kingCoordinates = king.GetCoordinates;
for (int i = 0; i < board.GetLength(0); i++)
{
for (int j = 0; j < board.GetLength(1); j++)
{
ChessPiece chessPiece = board[i, j];
if (chessPiece != null)
{
if (chessPiece.GetValidMoves().Contains(kingCoordinates))
{
return(true);
}
}
}
}
return(false);
}
private void MoveChessPiece(object sender, MouseButtonEventArgs e)
{
Border border = (Border)sender;
Border highlighted = (Border)mainWindow.FindName("highlighted");
if (highlighted != null)
{
int originX = Grid.GetRow(highlighted);
int originY = Grid.GetColumn(highlighted);
ChessPiece currentChessPiece = GetBoard[originX, originY];
if (border.Child == null || currentChessPiece.GetColor == currentTurnColor)
{
bool kingIsChecked = KingIsChecked(currentTurnColor);
int destinationX = Grid.GetRow(border);
int destinationY = Grid.GetColumn(border);
if (currentChessPiece.MoveResolvesCheck(currentTurnColor, new Point(destinationX, destinationY)))
{
List <Point> validMoves = null;
if (!KingIsChecked(currentTurnColor))
{
validMoves = currentChessPiece.GetValidMoves();
}
else
{
validMoves = currentChessPiece.GetValidMovesIfKingIsChecked();
}
if (validMoves.Where(point => point.X == destinationX && point.Y == destinationY).Any())
{
if (currentChessPiece.GetType().Name == "Pawn")
{
((Pawn)currentChessPiece).SetHasStepped = true;
}
currentChessPiece.SetCoordinates = new Point(destinationX, destinationY);
GetBoard[destinationX, destinationY] = GetBoard[originX, originY];
GetBoard[originX, originY] = null;
currentTurnColor = currentTurnColor == Color.White ? Color.Black : Color.White;
UpdateBoard();
mainWindow.UnregisterName(highlighted.Name);
if (IsCheckMate(currentTurnColor))
{
MessageBox.Show(currentTurnColor.ToString() + " has lost");
}
}
else
{
ColorTile(highlighted);
List <Point> highlightedValidMoves = null;
if (!KingIsChecked(currentTurnColor))
{
highlightedValidMoves = currentChessPiece.GetValidMoves();
}
else
{
highlightedValidMoves = currentChessPiece.GetValidMovesIfKingIsChecked();
}
UnshowValidMoves(highlightedValidMoves);
mainWindow.UnregisterName(highlighted.Name);
}
}
else
{
ColorTile(highlighted);
List <Point> highlightedValidMoves = null;
if (!KingIsChecked(currentTurnColor))
{
highlightedValidMoves = currentChessPiece.GetValidMoves();
}
else
{
highlightedValidMoves = currentChessPiece.GetValidMovesIfKingIsChecked();
}
UnshowValidMoves(highlightedValidMoves);
mainWindow.UnregisterName(highlighted.Name);
}
}
}
}