Correct answer: Q:e61...Kc6 2.Qd6# 1.Ra3?? zz 1...K:c4 2.Qc3# 1...Kc6 2.Qd6# but 1...Kb4! 1.Rb4?? zz 1...Kc6 2.Qd6# but 1...K:b4! 1.