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 bool MovingOneSquareLeftOrRight(Square origin, Square destination)
{
return (origin.DistanceOfRanksIsZeroTo(destination)
&& origin.DistanceOfFilesIsOneTo(destination));
}
private bool MovingOneSquareDiagonally(Square origin, Square destination)
{
return (origin.DistanceOfRanksIsOneTo(destination)
&& origin.DistanceOfFilesIsOneTo(destination));
}
private bool MovingTwoRanksAndOneFile(Square origin, Square destination)
{
return (origin.DistanceOfRanksIsTwoTo(destination)
&& origin.DistanceOfFilesIsOneTo(destination));
}