Single Comment

That is an error of Betza that should just be ignored, to promote to other side's piece-type as option in C.D.A. standard. Betza's wording only may be ambiguous on it here and there. As Muller indicates, best promotion is to only own-side's types, for practical purposes meaning the one highest-value piece-type almost always and whether or not the original(s) are already captured. Promoting to other side's too would belong, in not classic C.D.A. but some other, or combined cv concept-game, such as involving where player may move opponent's Pawn as a turn, or retract opponent move, or implementing mutual piece-type like Lavieri Promoter, or using capture and keep-to-drop anyway Shogi-style possession. There would be some logic to off-side promotion where rules like those already interplay forces more than normally. Not that it ruins C.D.A., because Game Courier may, or may not, allow such wider promotion. It does not seem to be fitting the otherwise OrthoChess rules emphasis with only differing forces, and flexible Betza could be talked out of it, if that were his intention. Among them, assuming limited promotion to one strongest piece, are Nutty Knights, Colourbound Clobberers and F.i.d.e. same-valued or does one have an edge?