Correct answer: Kf51...Bb4/Bc3/Bd2/Be1/Bd8/Nc7/Rb6 2.Qd8# 1...Bb6/Nb6/Ra7/Rc6 2.Qc6# 1...Bc7 2.Qe6# 1.f7?? (2.f8Q#/f8B#)
