Correct answer: Bb41...Kd5 2.Qf7# 1...R:c5 2.Nf4#/Nb4# 1.Rb4+?? 1...Kd5 2.Qf7# but 1...K:c3! 1.Bd4?? (2.Nf4#/Nb4#) 1...Kd5 2.Qf7