Correct answer: Bh51...Kb5 2.Qc4#/Ndc5# 1...b5 2.Nec5# 1...d5 2.Ndc5# 1.Bf7?? zz 1...Kb5 2.Qc4# 1...b5 2.Nec5# but 1...d5! 1.Bg6?? zz 1...Kb5