Correct answer: Qb7+1...Kd5 2.Qb7# 1.Rc3+?? 1...Kd5/Nc2 2.Qb7# but 1...N:b1! 1.Rc4+?? 1...Kd5 2.Qe4# but 1...Kf3! 1.Qe1+?? 1...K<