What Would You Discard? #4996557 (Tenpai)
Which tile do you discard? (maximize acceptance)
Show answer
西 ・ acceptance 8tiles: 4索 7索
Why this move works
The answer is 西 (West). The isolated honor tile is useless in this hand, and discarding it reaches tenpai (one tile from a win). The wait is 4s/7s — 8 tiles.
Discards like 5s accept more tiles, but they drop you back to 1-shanten, further from winning. Taking the tenpai that is closest to a win is correct.