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On Designing Good Chess Variants. Design goals and design principles for creating Chess variants.[All Comments] [Add Comment or Rating]
Kevin Pacey wrote on Sat, Sep 15, 2018 03:20 AM UTC:

I once figured out that it was okay to underpromote to a B or N instead of an Archbishop, if other type(s) of promotion caused a problem for some legal position(s) I dreamt up, in the case of my 10x10 Sac Chess variant, even, which has 10 possible piece types to promote to(!). Unfortunately, I didn't record the positions I thought of. If I think of examples of any of them later, I'll try to get around to posting them. In the case of avoiding a Chancellor promotion, for example, both a R or N promotion instead might still cause some sort of a problem that underpromoting to a B would avoid (though not if an Archbishop).