Correct answer: O-O-O1.Be4?? zz 1...Kc4 2.Na5# but 1...K:b2! 1.Kd2?? zz 1...Kc4 2.Na5# but 1...K:b2! 1.O-O-O! zz 1...Kc4 2.Na5# 1...Ka2 2.<
