Which character’s motivation propels the rising action in the short story “Rules of the Game” by Amy Tan?

Waverly “Meimei” Jong’s ambition to succeed at chess drives the story’s rising action. Her growing skill and desire to win lead to conflict with her mother, who treats chess as a way to gain status and pushes Waverly to compete. Lau Po teaches Waverly, while Vincent and Winston are her brothers, but their motivations do not propel the central action.

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