You are on the backup site for Any posts, moves, or other changes you make here will not be permanent, because the pages and database from the main site will be backed up here every midnight EST. Additionally, things may not be working right, because this site is also a testbed for newer system software. So, if you are not here to test, develop, or merely read this site, you may want to change .org to .com in the navigation bar and go to the main site.

The Chess Variant Pages

[ Help | Earliest Comments | Latest Comments ]
[ List All Subjects of Discussion | Create New Subject of Discussion ]
[ List Earliest Comments Only For Pages | Games | Rated Pages | Rated Games | Subjects of Discussion ]

Single Comment

ChessVA computer program
. Missing description[All Comments] [Add Comment or Rating]
Greg Strong wrote on 2021-06-27 UTC

If you use the 'y' operator, it can only handle one step before (you can't have an 'a' before the 'y'.) It only interprets that which the internal move generator can handle. In this case, the internal move generator could handle it because the 'mp' really just joins the two steps into a single leap, but it's not smart enough to figure that out.

But, yes, this piece can be done, just not with XBetza.  Actually, I've already written the include file for Expanded Chess, which will be included in the next release.  I will email it to you now.  But for reference, here's how you do the Osprey:

AddPieceType( "Osprey", "O", 750, 750, "Bird" );
Osprey.Step( <2, 0> ).SlideAfterStep( <1, 1> );
Osprey.Step( <2, 0> ).SlideAfterStep( <1, -1> ).MinSteps = 2;
Osprey.Step( <-2, 0> ).SlideAfterStep( <-1, 1> );
Osprey.Step( <-2, 0> ).SlideAfterStep( <-1, -1> ).MinSteps = 2;
Osprey.Step( <0, 2> ).SlideAfterStep( <1, 1> );
Osprey.Step( <0, 2> ).SlideAfterStep( <-1, 1> ).MinSteps = 2;
Osprey.Step( <0, -2> ).SlideAfterStep( <1, -1> );
Osprey.Step( <0, -2> ).SlideAfterStep( <-1, -1> ).MinSteps = 2;

In case you're wondering about the MinSteps = 2 on every other move path, that is to prevent the moves for the (0, 2) leaps from being generated twice.