They use the strategies for playing chess and for interacting with others.
Explanation:
Rules of the Game is a story by Amy Tan where Waverly's mother teaches her how to achieve more more by using the invisible strenght.
Invisible strength means quietly working towards a goal.
Waverly applies this to chess. She learns not to brag about her success or fret about losses.
For example a mentor she was learning chess from taught her that she should learn from her mistakes instead of being a sore loser.
Other rules are to never announce check with vanity lest someone with an unseen sword slit your throat, and to never throw pieces into the sandbox after losing a game.
