Correct answer: N4f61.Ng5? (2.d4#) 1...Rb4[a] 2.N:f7#[E] 1...Nf3/[б]/ 2.N:f3#[D] but 1...Nb3[c]! 1.Nd2? (2.d4#) 1...Nf3/[б]/ 2.N:f3#[D] 1...Nb3[c] 2.N