So the number for the... The payoff for the shooter is his probability of scoring and the payoff for the goal keeper is just the negative of that.

对罚球者来说,他的收益是进球的概率,而门将的收益是其相反数

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And the idea here is that the number 4 represents 40% chance of scoring if you shoot the ball to the left of the goal and the goal keeper dives to the left.

在这里表示进球概率是40%,前提是你从左路射门,而门将也扑向左路

耶鲁公开课 - 博弈论课程节选