Correct answer: Nf61.Nde3? (2.Ng4#[A]) 1...f:e3 2.Qg3# but 1...Nf7! 1.Nb6? (2.Nd7#[Б]) but 1...Ng6! 1.Qg3?? (2.Qg7#/Qe1#/Q:f4#) 1...c1Q/c1B