internal void SetGameState()
{
Player opponent = WhoseTurn;
Player lastPlayer = ChessUtilities.RevertPlayer(opponent);
bool isInCheck = ChessUtilities.IsPlayerInCheck(opponent, this);
var hasValidMoves = ChessUtilities.GetValidMoves(this).Count > 0;
if (isInCheck && !hasValidMoves)
{
GameState = lastPlayer == Player.White ? GameState.WhiteWinner : GameState.BlackWinner;
return;
}
if (!hasValidMoves)
{
GameState = GameState.Stalemate;
return;
}
if (isInCheck)
{
GameState = opponent == Player.White ? GameState.WhiteInCheck : GameState.BlackInCheck;
return;
}
GameState = IsInsufficientMaterial() ? GameState.Draw : GameState.NotCompleted;
}
internal bool PlayerWillBeInCheck(Move move)
{
if (move == null)
{
throw new ArgumentNullException(nameof(move));
}
ChessGame clone = DeepClone(); // Make the move on this board to keep original board as is.
Piece piece = clone[move.Source];
clone.Board[(int)move.Source.Rank, (int)move.Source.File] = null;
clone.Board[(int)move.Destination.Rank, (int)move.Destination.File] = piece;
return(ChessUtilities.IsPlayerInCheck(move.Player, clone));
}
internal bool PlayerWillBeInCheck(Move move)
{
if (move == null)
{
throw new ArgumentNullException(nameof(move));
}
ChessGame clone = DeepClone(); // Make the move on this board to keep original board as is.
Piece? piece = clone[move.Source.File, move.Source.Rank]; // TODO: throwing causes un-intended behavior. ?? throw new ArgumentException("Invalid move", nameof(move));
clone.Board[(int)move.Source.Rank][(int)move.Source.File] = null;
clone.Board[(int)move.Destination.Rank][(int)move.Destination.File] = piece;
return(ChessUtilities.IsPlayerInCheck(move.Player, clone));
}