All of you chose Down, but Up does best against Left and Middle does best against Right.

你们都选择下,可是选上是左的最佳对策,而选中是右的最佳对策

耶鲁公开课 - 博弈论课程节选

Let's look at my payoffs from choosing these three options Up, Middle, and Down, if I think it's equally likely that my opponent will choose Left and Right.

我们来看一下我从上中下这三个策略中,分别能获得什么样的收益,如果我认为我对手,选择左或右的可能性相同

耶鲁公开课 - 博弈论课程节选

Player I is choosing Up, Middle, or Down.

参与人I有三个策略,上中下

耶鲁公开课 - 博弈论课程节选

So, for example, you might think Down is dominated, but if we look a bit carefully we see that Down actually does better than Up against Right, and Down does better than Middle against Left.

例如说,你们可能认为选下是个劣势策略,但仔细观察后你会发现,参与人II选右时,选下要比上更好,参与人II选左,选下比选中更好

耶鲁公开课 - 博弈论课程节选