Correct answer: Nd21...K:a4[a] 2.Qc4#[A] 1...Kc6 2.Qd7# 1...Ka6 2.Qb7# 1.Kb7? (2.Qb3#[Б]) 1...K:a4[a] 2.Qc4#[A] but 1...Kb4/[б]/! 1.Nbc3+??