Correct answer: Qb31...Nb6/Nc7 2.Q:b6# 1...Nb5/Nc8 2.R:b5# 1.Rb6?? (2.Qe1#/Ra6#) 1...N:b6 2.Q:b6# 1...Nc7 2.Qe1# 1...a3 2.Ra6#