Correct answer: Nc51...Kc4 2.Qe6# 1...Kc6 2.Qe4# 1...Bg3/Bh2/Be3/B:d2 2.Qd7# 1...Nh4/Nh8/Nf8/N:e7 2.Q:d3# 1.Kd7?? (2.Q:d3#)