Correct answer: Qf31...Bf3/Bf5/Bg6/Bh7 2.N:f3# 1.Nab3+?? 1...Ke3 2.Qf3# but 1...K:e5! 1.N:c6+?? 1...Ke3 2.Qf3# but 1...N:c6+! 1.