private bool IsMoveValid(Piece piece, ChessBoardCell proposedMovementCell)
{
var oldPosition = piece.ChessBoardCell;
var oldCellsUnderAttack = CellsUnderAttackBySide[piece.Side.Opposite()];
piece.ChessBoardCell = proposedMovementCell;
var oldPieceAtProposedMovement = proposedMovementCell.Piece;
proposedMovementCell.Piece = piece;
RecalculateCellsUnderAttack(piece.Side.Opposite());
var myKing = PiecesBySideInPlay[piece.Side][typeof(King)].First();
// If my movement would put my king under attack (or leave it under attack), this is not a valid move.
var isValid = !CellsUnderAttackBySide[piece.Side.Opposite()].Contains(myKing.ChessBoardCell);
// Return the state back to where it was.
piece.ChessBoardCell = oldPosition;
oldPosition.Piece = piece;
CellsUnderAttackBySide[piece.Side.Opposite()] = oldCellsUnderAttack;
proposedMovementCell.Piece = oldPieceAtProposedMovement;
return(isValid);
}
public bool TryGetCellFromPosition(int x, int y, out ChessBoardCell chessBoardCell)
{
chessBoardCell = null;
if (x < 0 || x > 7 || y < 0 || y > 7)
{
return(false);
}
chessBoardCell = _boardCells[x][y];
return(true);
}
private void InitializeCells()
{
var boardCells = new ChessBoardCell[8][];
for (var x = 0; x < 8; x++)
{
var row = new ChessBoardCell[8];
for (var y = 0; y < 8; y++)
{
row[y] = new ChessBoardCell(x, y, this);
}
boardCells[x] = row;
}
_boardCells = boardCells;
}
private void InitializeCells()
{
var boardCells = new ChessBoardCell[8][];
for (var rowNumber = 0; rowNumber < 8; rowNumber++)
{
var row = new ChessBoardCell[8];
for (var columnNumber = 0; columnNumber < 8; columnNumber++)
{
row[columnNumber] = new ChessBoardCell(rowNumber, columnNumber, this);
}
boardCells[rowNumber] = row;
}
_boardCells = boardCells;
}
