What Would You Discard? #4996618 (1-shanten)

Which tile do you discard? (maximize acceptance)

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西・ acceptance 23tiles: 2筒 4筒 7筒 9筒 2索 3索 4索 5索

📖 Related reading

What to Discard: Five-Block Theory and Spotting Useless TilesBefore you count tile acceptance, decide which blocks to keep — the five-block framework. Block strength order and the discard order for isolated tiles.