Correct answer: Nb61...f4 2.Qg5# 1.Qh5?? (2.Q:f5#) 1...Kf4 2.Bb8# 1...K:f6 2.Bd4# but 1...b6! 1.Qg6?? (2.Q:f5#) 1...Kf4 2.Bb8# but 1...b6!
