Correct answer: Ng31.Bf5[A]? (2.Rh7#[Б]) 1...Qg3[a] 2.N:g3#[C] but 1...Qe3! 1.Rd5?? (2.Rh5#) but 1...Qc5! 1.Nd6?? (2.Nf5#) but 1...c:d6! 1.Ng3[C]!
