Correct answer: Qa81.Qh4?? (2.Qf6#) but 1...Ng2! 1.Qg2?? (2.Qg7#/Qg8#) but 1...N:g2! 1.Qf3?? (2.Qf6#/Qf8#) 1...Ng2 2.Qf8# but 1...N:f3!
