Correct answer: b51...e2 2.f5# 1...c2 2.b5# 1...Ncd7/Ne4+/Ne6/Nb3/Nb7/Na6 2.Ne4# 1...Nf3/Ng6/Ned7/Nc4/Nc6 2.Nc4# 1.f5?? (2.Q:e3#) 1...