Correct answer: Ne31...Kd4[a] 2.Rd7#[A] 1.Nb4? (2.Rg4#[Б]) 1...Kd4[a] 2.Rc7#[C] but 1...K:b4! 1.c:b6? (2.Rc7#[C]) 1...Kd4[a] 2.Rd7#[A] but 1...K:c2!