internal Board GetBoardAfterFirstKingCastlingMove(MovingFigure king)
{
var nextBoardState = new Board(Fen);
nextBoardState.SetFigureAt(king.From, Figure.None);
nextBoardState.SetFigureAt(king.To, king.Figure);
nextBoardState.GenerateNextFen();
return(nextBoardState);
}
private void UpdateCastlingData(MovingFigure mf)
{
var targetColor = mf.Figure.GetColor();
var currentCastlingFenPart = (targetColor == Color.White) ? WhiteCastlingFenPart : BlackCastlingFenPart;
if (string.IsNullOrWhiteSpace(currentCastlingFenPart))
{
return;
}
switch (mf.Figure)
{
case (Figure.BlackRook):
{
if (mf.From.X == 7)
{
BlackCastlingFenPart = (BlackCastlingFenPart.Contains('q')) ? "q" : "";
}
else
if (mf.From.X == 0)
{
BlackCastlingFenPart = (BlackCastlingFenPart.Contains('k')) ? "k" : "";
}
break;
}
case (Figure.WhiteRook):
{
if (mf.From.X == 7)
{
WhiteCastlingFenPart = (WhiteCastlingFenPart.Contains('Q')) ? "Q" : "";
}
else
if (mf.From.X == 0)
{
WhiteCastlingFenPart = (WhiteCastlingFenPart.Contains('K')) ? "K" : "";
}
break;
}
case (Figure.WhiteKing):
{
WhiteCastlingFenPart = string.Empty;
break;
}
case (Figure.BlackKing):
{
BlackCastlingFenPart = string.Empty;
break;
}
}
}
public Board Move(MovingFigure mf)
{
var nextBoardState = new Board(Fen);
nextBoardState.SetFigureAt(mf.From, Figure.None);
nextBoardState.SetFigureAt(mf.To, mf.Promotion == Figure.None ? mf.Figure : mf.Promotion);
if (MoveColor == Color.Black)
{
nextBoardState.MoveNumber = MoveNumber + 1;
}
nextBoardState.MoveColor = MoveColor.FlipColor();
nextBoardState.UpdateCastlingData(mf);
nextBoardState.GenerateNextFen();
return(nextBoardState);
}
public bool IsCheckTo()
{
Square targetKingPosition = FindTargetKingPosition();
var move = new Move(this);
MovingFigure currentMovingFigure;
foreach (var figureOnSquare in YieldFigures())
{
currentMovingFigure = new MovingFigure(figureOnSquare, targetKingPosition);
if (move.CanMove(currentMovingFigure))
{
return(true);
}
}
return(false);
}
public Board Castle(MovingFigure king, MovingFigure rook)
{
var nextBoardState = new Board(Fen);
nextBoardState.SetFigureAt(king.From, Figure.None);
nextBoardState.SetFigureAt(king.To, king.Figure);
nextBoardState.SetFigureAt(rook.From, Figure.None);
nextBoardState.SetFigureAt(rook.To, rook.Figure);
if (MoveColor == Color.Black)
{
nextBoardState.MoveNumber = MoveNumber + 1;
}
nextBoardState.MoveColor = MoveColor.FlipColor();
nextBoardState.UpdateCastlingData(king);
nextBoardState.GenerateNextFen();
return(nextBoardState);
}
public bool IsCheckAfterMove(MovingFigure movingFigure)
{
var after = Move(movingFigure);
return(after.IsCheckTo());
}
