Correct answer: Qe41...Ra8 2.Re:b7#/Rb:b7# 1.Re:b7+?? 1...Ka8 2.Qa6# but 1...R:b7! 1.Rb:b7+?? 1...Ka8 2.Qa3#/Qa6#/Ra7# but 1...R:b7!
