📝George Duke wrote on Mon, Nov 22, 2004 06:29 PM UTC:
CVP has Billiards Progressive Chess link that shows Gilman is right that, as Queen can be double-pathed off one bounce (to certain squares), both Bishop and Q qualify off two or three reflections as dual-pathed. For Betza's Rose too, I think however return all the way to departure square after full circuit is better dis-allowed, though not a null move since they may be blocked. Thanks for suggestion of Crooked Bishop for follow-up, 'Multipath' being more general category than 'Leaper' or 'Rider' and having countless examples.
http://www.thegamesjournal.com/articles/DefiningtheAbstract.shtml http://www.chessvariants.org/index/msdisplay.php?itemid=MSpartnershipcha