Lambik: What I want to avoid is a situation where people start to request more and more variants of this game, with different combinations of available pieces. Ideally, I would like to create only one game called Superchess and the creator would define a subset of valid pieces out of total 30 ones. But all such games would be marked with the same code, sharing the BKRs, stairs, etc. Just like backgammon matches with a doubling cube - no matter if you define it with 3 or 21 points to win, it's still the same game.