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by less_less 1614 days ago
I agree with your criticism. It's also not clear what "optimal" means, since there are multiple desirable metrics: fewest average guesses, fewest worst-case guesses, etc.

Full brute force is allllmost computationally feasible, at least for some metrics. Like you could probably exhaust the search space in a month on a small cluster, at least if you're minimizing either (worst case, average case) or (pr(lose), pr(take 6 guesses), pr(take 5 guesses) ...). It's also significantly easier to brute-force in hard mode.