Correct answer: Nh51...Kf3 2.O-O# 1...Nh4/Nh8/Nf4/Nf8/Ne5/Ne7 2.N:h4# 1...Ne4/Ne8/N:f5/Nf7/Nc4/Nc8/Nb5/Nb7 2.B:e4# 1.N<