Rather than randomizing over the potentially very large set pure strategies in Si,she could randomize separately over the possible actions at each of her information sets.

• 他必须能根据过去、为了未来、研究现在。他必须洞察人类的本性和社会结构。他必须果断而公平，两种心境缺一不可：象艺术家，超然物外；