Correct answer: g51...Kf4 2.Qf6# 1...Kd4 2.Qd6# 1.Kc4?? zz 1...Kf4 2.Qf6# but 1...b3! 1.Qb6?? zz 1...Kf4 2.Qf6#/Qe3# but 1...Kd5! 1.