Correct answer: Kf71...Nc5 2.Nb6# 1...Nd4 2.N:e3# 1.Nc3+?? 1...Kc5 2.Qa7# but 1...N:c3! 1.f5?? (2.Qe6#) 1...Nc5 2.Nb6# but 1...Nd4! 1.<
