private void HandleKingsideCastling(Square origin, Square destination)
{
var kingsideRookSquare = GetKingsideRookSquare(origin);
if (!destination.DistanceOfFilesIsOneTo(kingsideRookSquare)) return;
if (origin.Color != kingsideRookSquare.Color) return;
if (origin.DistanceOfFilesIsNotTwoTo(destination)) return;
if (!(kingsideRookSquare.Occupier is Rook)) return;
Board.SetSquare(kingsideRookSquare.File, kingsideRookSquare.Rank, new NullPiece(Board));
Board.SetSquare(origin.File + 1, origin.Rank, kingsideRookSquare.Occupier);
}
private void HandleQueensideCastling(Square origin, Square destination)
{
var queensideRookSquare = GetQueensideRookSquare(origin);
if (!destination.DistanceOfFilesIsTwoTo(queensideRookSquare)) return;
if (origin.Color != queensideRookSquare.Color) return;
if (origin.DistanceOfFilesIsNotTwoTo(destination)) return;
if (!(queensideRookSquare.Occupier is Rook)) return;
Board.SetSquare(queensideRookSquare.File, queensideRookSquare.Rank, new NullPiece(Board));
Board.SetSquare(origin.File - 1, queensideRookSquare.Rank, queensideRookSquare.Occupier);
}