💡📝H. G. Muller wrote on Sun, Jul 12, 2020 06:12 AM UTC:
Well, Chu Shogi seems to be the only case where this exception exists, and it makes no sense to tailor a diagram that is intended for general use too much to one specific variant. The diagram already has a 'hook' for customizng promotion rules to a variant: the page can provide a function WeirdPromotion() for sanctioning a default promotion, or altering it. I guess it would have been better if the Chu Shogi exception for last-rank Pawn promotion would have been implemented through that. Now the Diagram does it by default, it also happens in Dai Shogi, where the rule makes no sense (and thus probably would not have applied) because it is always better to promote a Pawn to Gold when entering the zone.
Well, Chu Shogi seems to be the only case where this exception exists, and it makes no sense to tailor a diagram that is intended for general use too much to one specific variant. The diagram already has a 'hook' for customizng promotion rules to a variant: the page can provide a function WeirdPromotion() for sanctioning a default promotion, or altering it. I guess it would have been better if the Chu Shogi exception for last-rank Pawn promotion would have been implemented through that. Now the Diagram does it by default, it also happens in Dai Shogi, where the rule makes no sense (and thus probably would not have applied) because it is always better to promote a Pawn to Gold when entering the zone.