private bool IsIgnoreEnemyKing(ChessPiece targetPlace)
{
if (!IgnoreEnemyKingFlag)
{
return(false);
}
var targetColor = targetPlace.GetPlayerColor();
if (targetColor == null)
{
return(false);
}
var targetColorValue = targetColor.Value;
var isEnemyPiece = Piece.GetPlayerColor()?.Invert() == targetPlace.GetPlayerColor();
var isKingPiece = CheckMateLogic.MapKing(targetColorValue) == targetPlace;
return(isEnemyPiece && isKingPiece);
}
/// <summary>
/// Get move status.
/// </summary>
/// <param name="newPosition">Check position.</param>
/// <returns>Is not outside board.</returns>
protected bool CanMove(ChessPoint newPosition)
{
int x = newPosition.X;
int y = newPosition.Y;
if (0 <= x && x < Field.Width && 0 <= y && y < Field.Height)
{
var targetPlace = Field[x, y];
var sideName = targetPlace.GetPlayerColor();
var result = false;
if (targetPlace == ChessPiece.Empty)
{
result = true;
}
else
{
result = SideName != sideName;
}
bool isYourKingIsUnderAttack = Master.CheckedPlayer.HasValue &&
Master.CheckedPlayer == Piece.GetPlayerColor();
if (result && isYourKingIsUnderAttack)
{
// If king is under attack, you next step must prevent a check state
var fieldCopy = new VirtualField(Field.CloneMatrix());
fieldCopy[newPosition] = fieldCopy[Position];
fieldCopy[Position] = ChessPiece.Empty;
var pieceColor = Piece.GetPlayerColor().Value.Invert();
return(!CheckMateLogic.IsCheck(pieceColor, fieldCopy, Master));
}
return(result);
}
return(false);
}
