Correct answer: Nd31...Ke5 2.Qe3# 1...Kf4 2.Qd4# 1.Rc3?? (2.Qe3#) 1...Kf4 2.Qd4# but 1...Ke5! 1.R:c7?? zz 1...Kf4 2.Qd4# but 1...Ke5!