Correct answer: Bb31...f6/f5 2.Ng6# 1...Ng1/Nf:g5/Nh2/Nh4/N:e1/Nd2 2.f4# 1...Raa6/R:a5/Ra8/Rd7 2.Nd7# 1...Nf6/N:f8 2.B:f6# 1...Rb5