Correct answer: Nc41.Nc5+?? 1...Kf4 2.R:d4# but 1...B:c5! 1.Q:f3+?? 1...K:e5 2.Nc4# but 1...Kd3! 1.Nc4! (2.Q:f3#) 1...Kf4 2.Qg4# 1..
