Playtair's law

例句：

1. 1. The Playtair'slaw states that the first player to reacha certain score wins.
   Playtair's law规定，第一个达到一定分数的玩家获胜。
2. 2. According to the Playtair's law, all players must followthe same rules.
   根据Playtair's law，所有玩家都必须遵守相同的规则。
3. 3. The Playtair's lawis often used in board games to determinethe winner.
   Playtair's law在棋盘游戏中常用来判定赢家。