Correct answer: Rd71...c4[a] 2.Re3# 1...b3 2.Nc3# 1...e5 2.N:g5#[A] 1...Ng7/N:f6 2.N:g3# 1...Nf5 2.Re6#[Б] 1...N:e2+ 2.Q:e2# 1.Rd5? (2.Qd3#) 1...c