Correct answer: Qb71...c4 2.Qh7# 1.Qe1?? zz 1...Kc4 2.Qf1# 1...d4 2.Ne5# but 1...c4! 1.Qa7?? zz 1...Ke4 2.Qh7# 1...Kc4 2.Qa6# 1...c4 2.Q
