If you were to defend the easy pass and he goes through the easy pass, he will get into your country with one battalion and that's the same as he would have got if he went through the hard pass.

如果你们都选择的是平坦之途,那么他攻入你的国家时他只剩一个营,这与他选择崎岖之途别无二致

耶鲁公开课 - 博弈论课程节选