I also think this 3 pass feature triggering once incorrectly is a much worse negative than it triggering once correctly: it is much more rude for a go server to stop you playing legitimate go than a human player to play stalling moves, see Server ending game by its own decision - #39 by Uberdude. So if 40% of triggered cases are mid game, and even if of those only 20% are false positives where the player forced to lose was not stalling but just losing, by my value judgement ratio it would be a net improvement to implement the “only trigger if no valuable moves left” change.
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