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Fairy-Max: an AI for playing user-defined Chess variants. A chess engine configurable for playing a wide variety of chess variants.[All Comments] [Add Comment or Rating]
💡📝H. G. Muller wrote on Sun, Jun 20, 2021 09:09 PM UTC in reply to Aurelian Florea from 07:30 PM:

The parent variant is indeed the word on the ' Game:' line after the piece-to-char table. I don't think there are any standard variants with a 2-deep zone, for 8x8 boards or larger. In variant shogi it uses 1/3 of the board height, which works for the 6x6 Judkin's Shogi (which has a zone of 2 ranks).

With legality testing switched off, however, WinBoard would obey the engine when it plays a promotion move. That solves the problem in engine-engine games. In human-engine games it might work when you type moves that should promote, in this case.