Correct answer: Qh11...Re4/Rc4 2.Qh6# 1...R:b4 2.Qh6#/N:b4# 1...b5 2.Na5# 1.Rf6+?? 1...Kd7 2.Rd6# but 1...Kb7! 1.R:a7?? (2.b5#/Ne7#)