Correct answer: Nb71...K:e6 2.Qf7# 1...g5 2.Qf5# 1.B:c6+?? 1...K:e6 2.Qf6#/Qf7# but 1...K:c6! 1.Re:d3+?? 1...K:e6 2.Qf7# but 1...N:d3!
