Correct answer: N:e61...c5 2.Nb5# 1...e5 2.f:e5# 1.Rb7?? zz 1...e5 2.f:e5# but 1...c5! 1.Nc5?? (2.Ne4#) but 1...K:c5! 1.Nd2?? (2.Ne4#) but 1...Kc5! 1.Kd2?
