Correct answer: Bg31...g4[a] 2.Nh4#[A] 1...Nd4/[б]//Nd8/[б]//Ne5[c]/Ne7/[б]//Nb4/[б]//Nb8/[б]//Na5/[б]//Na7/[б]/ 2.N:d4#[Б] 1...Ng3/Nh2/Ne3+ 2.Re3#