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Sep 15, 2022 at 8:44 comment added Hauke Reddmann Also, this answers "mate in some special position". I'd like to see "long mate from random position". For example, RR is easy. I look into that myself :-)
Sep 14, 2022 at 18:04 comment added Andrew Chin Some retrograde analysis on some of these positions yields some unforced positions. For example, in the mate with two bishops, nothing is stopping Black from playing Kh6 instead of Kh8 on the previous move.
Sep 14, 2022 at 15:48 comment added SE - stop firing the good guys Same for the KQNvK and KBNvK cases. The discovered checkmate isn't forced.
Sep 14, 2022 at 15:46 comment added SE - stop firing the good guys I'm not convinced by the KQBvK position shown. The black king must have moved into the corner from g8 in the previous move, because of a bishop check. But then: couldn't it have moved to f8 instead? Doesn't look forced, the same way that a (regular) KNNvK checkmate position exists but isn't forced.
Sep 14, 2022 at 13:52 history answered Peter Fischer CC BY-SA 4.0