Correct answer: Bc3-e1 1.Bd3-f1 ? (A) danger: 2.Qd5-d3 # 1...b3*c2 2.Bc3-e1 # (B) 1...Qg4*g3 2.Qd5-d4 # but 1...Qg4-e4 ! 1.Bc3-e1