Correct answer: Nf41...a3 2.Qb3# 1...Qf4 2.R:f4# 1...Qe4 2.R:e4# 1...Qd4 2.R:d4# 1.Ra8?? (2.R:a4#) but 1...c2! 1.Qa6+?? 1...Kb4 2.Q:a4# but 1