private IEnumerable <Square> AllLoopPositions()
{
if (_restrictedTo is not null)
{
yield return(_board[_restrictedTo]);
}
else
{
for (int i = 1; i <= _board.NrOfPlayableSquares; i++)
{
var squareId = new SquareId(i);
if (_board[squareId].Color == _currentTurn)
{
yield return(_board[squareId]);
}
}
}
}
public static PossibleMoveCalculator ForChainCaptures(BoardPosition board, SquareId from, GameSettings settings)
{
var currentTurn = board[from].Color ?? throw new ManualValidationException("Invalid move.");
return(new PossibleMoveCalculator(board, settings, currentTurn, from, 1));
}
public static PossibleMove CaptureMove(SquareId from, SquareId to, SquareId?victim, bool moreCapturesAvailable)
{
return(new PossibleMove(from, to, victim, moreCapturesAvailable));
}
public Square(SquareId id, Piece piece, BoardPosition board)
{
Id = id;
Piece = piece;
_board = board;
}
public static PossibleMove NormalMove(SquareId from, SquareId to) => new PossibleMove(from, to, null, false);
private PossibleMove(SquareId from, SquareId to, SquareId?victim, bool moreCapturesAvailable)
: base(from, to, victim is not null)
{
MoreCapturesAvailable = moreCapturesAvailable;
Victim = victim;
}
protected Move(SquareId from, SquareId to, bool isCapture)
{
From = from;
To = to;
IsCapture = isCapture;
}
public Square this[SquareId n] {
get => _squares[n.Value - 1];
/// <summary> /// The square at (x, y). /// The top left square is (0, 0). /// </summary> public Square? this[int x, int y] => IsPlayable(x, y) ? this[SquareId.FromPosition(x, y, Size)] : null;