Correct answer: Nd51.Bb2?? (2.Qa5#) but 1...K:b4! 1.Qa1?? zz 1...Kc5 2.Qe5# but 1...Ka4! 1.Qb2?? zz 1...Kc5 2.Qe5# but 1...Ka4! 1.Qd2??
