Correct answer: Kf21...Qb4/Qe7/Qc8/Qa6 2.Nf6#/Ng5#/Ned2#/Nd6#/Nc3# 1...Qb3+ 2.Nc3# 1...Qb2 2.Ned2# 1...Qb8+/Qc7+/Qd7 2.Nd6#