Hikaru no Go

The Most Inconsiderate Act (1x11)

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The Go Sallon Yuki goes to doesn't mind giving him money for winning games, but they are tired of him cheating to get it. They hire a skilled player who pretends not to know anything about Go to teach Yuki a lesson. Unfortunately, Yuki falls for the trick and ends up betting 10,000 yen (about $90). Can Yuki manage to defeat this skilled player?