Michael Nelson wrote on Tue, Feb 25, 2014 01:03 AM UTC:Excellent ★★★★★
Excellent thematic variant! I've not seen the idea of imposing colorboundness on all pieces but removing it by the odd number of files on a cylindrical board, thought I recognize component ideas.
A small quibble about promotion:
Promotion to a Knight is needed in FIDE Chess, as its moves are not a subset of the Queen's move. In some positions, the Knight can checkmate when the Queen can't even check. This factor does not apply to this game; but there is one case where underpromotion to Rook or Bishop in needed (rather than merely allowed) in FIDE--when promoting to Queen would result in immediate stalemate, but the lesser promotion could force checkmate on a subsequent move. With three combination pieces to choose from, it is much less likely in this variant, but analysis is needed to determine if it is possible: if so, underpromotion must be allowed (if and only if stalemate is a draw).