public void TakeBlackTurn(out bool gameOver)
// Takes Black's turn, moving its king. Checks for and handles checkmate and stalemate.
// Handles draw for King vs King but not for any other situation such as King and Bishop
// vs King. In checkmate, stalemate, or draw, sets gameOver to true; otherwise, sets it to
// false. Does not enable/disable squares.
{
++numMoves;
AnalyzeAttacks();
BlackKing.FindMoves(this.SQUARES);
ChessSquare BlackKingChoice = BlackKing.ChooseMove();
if (BlackKingChoice != null)
{
if (BlackKingChoice.Piece != null)
{
White.Remove(BlackKingChoice.Piece);
}
BlackKing.Move(BlackKingChoice);
if (White.Count == 1) // Draw by lack of material
{
// This would be slightly better with a custom message box with a bigger font.
MessageBox.Show("Draw by lack of material 😞\nIn " + numMoves + " moves");
gameOver = true;
}
else
{
AnalyzeAttacks();
gameOver = false;
}
}
else // Black King cannot move, is in checkmate or stalemate
{
if (BlackKing.Square.WhiteAttacked)
{
MessageBox.Show("Checkmate! 😁\nIn " + numMoves + " moves");
}
else
{
MessageBox.Show("Stalemate 😞\nIn " + numMoves + " moves");
}
gameOver = true;
}
}
public void StartNewGame(Type[] whitePieceTypes)
// Starts a new game with a Black King and white pieces of Types whitePieceTypes. Each Type
// in whitePieceTypes must be a subclass of ChessPiece, must not be abstract, and must be
// white. In case there are already pieces on the board, the board is cleared first.
{
// Check whitePieceTypes for argument errors
foreach (Type type in whitePieceTypes)
{
if (!type.IsSubclassOf(typeof(ChessPiece)))
{
throw new ArgumentException(
"Each type in whitePieceTypes must be a subclass of ChessPiece.");
}
if (type.IsAbstract)
{
throw new ArgumentException("No type in whitePieceTypes may be abstract");
}
}
// Basic setup
clearBoard();
numMoves = 0;
White = new List <ChessPiece>(capacity: whitePieceTypes.Length);
byte numPieces = (byte)(whitePieceTypes.Length + 1); // +1 for Black King
// Put pieces on random squares, but make sure Black King is not in checkmate or
// stalemate
ChessSquare[] initSquares = randomSquares(numPieces);
BlackKing = new BlackKing(initSquares[0]);
for (int i = 1; i < initSquares.Length; ++i)
{
White.Add( // Dis wite heer bout to git complikated :)
(ChessPiece)(whitePieceTypes[i - 1]
.GetConstructor(types: new Type[] { typeof(ChessSquare) })
.Invoke(parameters: new object[] { initSquares[i] })));
}
AnalyzeAttacks();
BlackKing.FindMoves(SQUARES);
while (BlackKing.Square.WhiteAttacked || BlackKing.Moves.Count == 0)
{
initSquares = randomSquares(numPieces);
BlackKing.Move(initSquares[0]);
for (int i = 1; i < initSquares.Length; ++i)
{
White[i - 1].Move(initSquares[i]);
}
AnalyzeAttacks();
BlackKing.FindMoves(SQUARES);
}
// Set startData
startData = Tuple.Create(whitePieceTypes, new ChessSquare[White.Count], BlackKing.Square);
for (int i = 0; i < White.Count; ++i)
{
startData.Item2[i] = White[i].Square;
}
// Enable squares with white pieces
foreach (ChessPiece piece in White)
{
piece.Square.SetEnabled(true);
}
}