Correct answer: Qe21.Nb5? zz 1...d5 2.Nd6# 1...f5 2.N:c3# but 1...Kd5! 1.Qd1? zz 1...d5 2.Q:g4# 1...f5 2.Qd4# but 1...Kf5! 1.Qf1? zz 1...d5 2.Q