Correct answer: Ra81...Nb5 2.Q:c6# 1...c5 2.Rb6# 1.Ka5?? (2.Qd7#/Rb6#) 1...Nb5 2.Q:c6# but 1...N:c8! 1.Rd8?? zz 1...Kc7 2.Qe7#/Qd7#
