AlphaEvolve problems·alphaevolve:68
Logic puzzles (problem 68)
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We have three guards in front of three doors. The guards are, in some order, an angel (always tells the truth), the devil (always lies), and the gatekeeper (answers truthfully if and only if the question is about the prize behind Door A). The prizes behind the doors are €0, €100, and €110. You can ask two yes/no questions and want to maximize your expected profit. The second question can depend on the answer you get to the first question.
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qed.bot, “Logic puzzles (problem 68)”, https://qed.bot/t/alphaevolve-68, as of 30 Sep 2026.