What Would You Discard? #4996558 (Tenpai)
Which tile do you discard? (maximize acceptance)
Show answer
9筒 ・ acceptance 8tiles: 4筒 7筒
Why this move works
The answer is 9p. Discarding the floating terminal 9p leaves the 5p-6p two-sided shape, reaching tenpai on 4p/7p (8 tiles).
Discarding 6p looks wider, but it stays at 1-shanten. Take the tenpai and head for the win by the shortest route.