Correct answer: Nb51.Q:c8+?? 1...Bc7 2.Ra6#/Q:c7# but 1...K:d6! 1.Nb8+?? 1...Kb6 2.N:c8# but 1...K:d6! 1.Nf5?? (2.b5#) 1...Nd6 2.Nd4#