Correct answer: Na61...Q:d7 2.c:d7# 1.c8Q?? (2.Qb7#) 1...Q:d7 2.c:d7#/N:d7# but 1...Q:c8! 1.Na6! (2.f:e8Q#/f:e8R#/d:e8Q#/d:e8R#) 1...Bg4 2.f:e8<