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Interactive diagrams. Diagrams that interactively show piece moves.[All Comments] [Add Comment or Rating]
H. G. Muller wrote on 2021-12-28 UTC

No, ther can be only one function BadZone, which must detect all moves you want to forbid, and return true (non-zero) for those (and false or 0 for the others). So you have to put this in BadZone just before the final return statement (which would otherwise return 'false', because in e.p. capture you only advance one rank)