H. G. Muller wrote on Tue, Oct 11, 2016 07:38 AM UTC:
The modifier 'y' is a 'range toggle', and does not affect direction. I introduced the convention that directions in continuation legs are always encoded in the K system, so that fs always means diagonally forward. If you really would want a second W step that could go to both the D and the F squares (which is rare, because these are non-symmetry-related paths),you can always write ffsW to prevent the f+s are parsed as one direction. (Or actually write nothing at all, because the default directionality for a continuation leg is 'all directions except back to the square you came from'. So aW would do it.)
Thus afsW is the XQ Horse, which still is a stepper on the second leg, while yafsW is an Aanca, (that cannot move to the W squares, but can be blocked there) which slides in the second leg. And afsR would be a 'Bent Rook', which can slide in both legs, and thus decide where it takes the corner,making it an enormously powerfull piece.
The modifier 'y' is a 'range toggle', and does not affect direction. I introduced the convention that directions in continuation legs are always encoded in the K system, so that fs always means diagonally forward. If you really would want a second W step that could go to both the D and the F squares (which is rare, because these are non-symmetry-related paths),you can always write ffsW to prevent the f+s are parsed as one direction. (Or actually write nothing at all, because the default directionality for a continuation leg is 'all directions except back to the square you came from'. So aW would do it.)
Thus afsW is the XQ Horse, which still is a stepper on the second leg, while yafsW is an Aanca, (that cannot move to the W squares, but can be blocked there) which slides in the second leg. And afsR would be a 'Bent Rook', which can slide in both legs, and thus decide where it takes the corner,making it an enormously powerfull piece.