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);
}
private bool MovingOneRankAndTwoFiles(Square origin, Square destination)
{
return (origin.DistanceOfRanksIsOneTo(destination)
&& origin.DistanceOfFilesIsTwoTo(destination));
}
