Correct answer: Nb51...Ne4/Nf1/Nf3/Nc4/Nb1/Nb3 2.R:e4# 1...R:f6+ 2.Q:f6# 1.Re8+?? 1...Ne6 2.R:e6# but 1...Kd6! 1.Ne2?? (2.g4#) 1