public override bool IsLegalMove(Square origin, Square destination)
{
if (origin.Color == destination.Color) return false;
if (origin.AlongFileOrRank(destination)) return true;
return origin.DiagonallyTo(destination);
}
public override bool IsLegalMove(Square origin, Square destination)
{
if (origin.Color == destination.Color) return false;
return (origin.AlongFileOrRank(destination) && PathIsFree(origin, destination));
}
