Correct answer: Qf11...Kd5 2.Rb6# 1...Nd6 2.Ne7# 1...Ra5/Rb4 2.Nb4# 1...Nd5 2.Nb8# 1.Qb1?? (2.Qb5#/Ra7#/Rc7#/Rf7#/Rg7#/Rh7#)
