Correct answer: Qd41...a2 2.Qb2# 1.Qd3+?? 1...Ka2 2.Qb1# but 1...Kb4! 1.Qd5+?? 1...Kc3 2.Qc4# but 1...Kb4! 1.Qe2?? (2.Qc4#) 1...a2 2.Q