Correct answer: Ka31...Ne2/Nb3 2.Q:a2# 1...B:b5 2.Nd:b7# 1.Nb3+?? 1...N:b3 2.Q:a2# but 1...Ka4! 1.b:a6?? zz 1...Ne2/Nb3 2.Q:a2# but 1...b:a6
