Correct answer: Bb81...b4 2.Qd7# 1...c4 2.Qc8# 1...R:a5 2.Qe6# 1...Re4 2.Q:e4# 1...R:g4+ 2.f:g4# 1...Bg7 2.N:e7# 1.f4+?? 1...Kd6/Re4 2.Qd7# but