Correct answer: Ne81. Ne8! waiting 1. ... Nc7 2. b:c7# 1. ... Ne7 2. f:e7# 1. ... N:b6 2. Ba5# 1. ... N:f6 2. Bg5# 1. ... Nb4 2. B:b4# 1. ... Nf4 2. B:f4# 1.