The 2nd study is by G. Afanasiev 1960 (and not by the so-called Pikulik who only removed two useless pawns). In Minski's study, the defence of the 3rd black move was not considered by anyone, and therefore the study was not completely solved by anyone (Murdzia & Piorun score 3, Vuckovic 2, the megalomaniac 0, etc.). No, this is not a mistake, Gamnitzer is the author of the direct 5#, not of the selfmate!
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