(13)Mihail Sosedkin, Yuri Gordian(Probleemblad 1972, 2nd Prize)H#3 2sols.(4+5)1.Rb3 Se3 2.Ka5 Kg3 3.Rb5 Sc4#1.Bc6 Se4 2.Ka4 Kg2 3.Bb5 Sc5#　Z.Janevskiによると、本作は恐らく白のanticipatory self-pinと黒の critical moveを組み合わせた一号局で

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