public bool IsPlayerCheckmated(PlayerTypes player, IEnumerable <Piece> rows,
Dictionary <Piece, Point[]> piecesMovesDic)
{
foreach (var piece in piecesMovesDic)
{
foreach (var newPos in piece.Value)
{
//Simulate board after move
var oldPos = piece.Key.Position;
Piece destPiece = Board.At(newPos); //To restore the old board
ChangePiecePos(Board.At(oldPos), newPos);
Board[oldPos.Y][oldPos.X] = null;
var enemyPossibleMoves = GetPossibleMoves(rows, CurrPlayer);
var isPlayerChecked = IsPlayerChecked(player, rows, enemyPossibleMoves);
//Restore old board
ChangePiecePos(Board.At(newPos), oldPos);
Board[newPos.Y][newPos.X] = destPiece;
if (!isPlayerChecked)
{
return(false);
}
}
}
return(true);
}
private void InitValidations()
{
_validations = new List <FuncEnumPair <Point, Statuses> >
{
new FuncEnumPair <Point, Statuses>((origin, dest) =>
!(ChessUtils.IsValidPosition(origin) && ChessUtils.IsValidPosition(origin)),
Statuses.Invalid_Indexes),
new FuncEnumPair <Point, Statuses>((origin, dest) =>
Board.At(origin)?.Player != CurrPlayer,
Statuses.Invalid_OriginIsNotCurrentPlayerPiece),
new FuncEnumPair <Point, Statuses>((origin, dest) =>
Board.At(dest)?.Player == CurrPlayer,
Statuses.Invalid_DestIsCurrentPlayerPiece),
new FuncEnumPair <Point, Statuses>((origin, dest) =>
origin.Equals(dest),
Statuses.Invalid_OriginIsEqualToDest),
new FuncEnumPair <Point, Statuses>((origin, dest) =>
!Board.At(origin).GetPossibleMoves(Board).Contains(dest),
Statuses.Invalid_PieceMovement),
new FuncEnumPair <Point, Statuses>((origin, dest) =>
Board.At(origin).GetPossibleMoves(Board).Contains(dest),
Statuses.Valid)
};
}
private bool TryPerformMove(Point origin, Point dest)
{
Piece destPiece = Board.At(dest); //to restore the old board
ChangePiecePos(Board.At(origin), dest);
Board[origin.Y][origin.X] = null;
var rows = Board.SelectMany(row => row);
if (IsPlayerChecked(CurrPlayer, rows))
{
ChangePiecePos(Board.At(dest), origin);
Board[dest.Y][dest.X] = destPiece;
return(false);
}
return(true);
}
