Correct answer: Qb41.Kd7?? (2.Nc6#) 1...R:a7 2.Qe8# but 1...K:a7! 1.Qe5?? (2.Nc6#) 1...R:a7 2.Rd7#/Re7#/Rf7#/Rg7#/Rh7# but 1...K:a7+!