Correct answer: Rc61...K:d6 2.Qd5# 1...Rb8 2.c:b8Q#/c:b8B# 1...N:d6 2.c8Q#/c8B# 1...Ne7/Nb6 2.c8N# 1...Bg6/Bh5 2.c:d8Q#/c:d8R# 1.