People · Republic of Korea
Yun-seong Choi (최윤성)
3×3 · top 3.1% of 284,439 all-time · competing since July 2018 · 2018CHOI15
Yun-seong Choi (최윤성) has been competing for 8 years. His best event is the 3×3: a personal-best single of 8.16, set at Korea Open 2026, puts him in the top 3.1% of the 284,439 people who have ever been ranked in the event, and 192nd in Republic of Korea. Until July 2008, no official 3×3 solve in the world had been that fast. Across 3 competitions since July 2018, he has put 49 official solves on the record across four events. Solve to solve, his 3×3 times vary about 14% around a typical one, an early reading from 5 counted rounds. His 3×3 best has come down from 48.49 in July 2018 to 8.16, an 83% improvement. He has entered three competitions, more competitions than 69% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | Republic of Korea | |
|---|---|---|---|---|---|
| 3×3 | 8.16 | 9.41 | top 3.1% | 192 / 4,352 | |
| 4×4 | 37.67 | 44.85 | top 9.4% | 187 / 1,308 | |
| 5×5 | 1:31.48 | 1:40.91 | top 28.5% | 255 / 716 | |
| 2×2 | 4.90 | 6.15 | top 38.1% | 1,113 / 2,319 |
Percentile against all competitors ever ranked in each event, a fairer measure than raw rank, because the pools differ by a factor of ten.
The line so far
Best single per competition, 3×3. Faster is higher — the axis is the right way up.
The story so far
- 15 Aug 2026First sub-10 3×3: 8.55 at Korea Open 2026.
- 15 Aug 2026Three personal bests in one day at Korea Open 2026.
- 13 Oct 2019First sub-30 3×3: 11.83 at Daegu Autumn Open 2019.
- 13 Oct 2019First sub-20 3×3: 11.83 at Daegu Autumn Open 2019.
- 13 Oct 2019First sub-15 3×3: 11.83 at Daegu Autumn Open 2019.
- 20 Jul 2018First competition: Korean Championship 2018. A 48.49 3×3 single to start from.
Competitions
- Korea Open 2026 · 15 Aug 2026 — 3 personal bests set
- Daegu Autumn Open 2019 · 13 Oct 2019 — 2 personal bests set
- Korean Championship 2018 · 20 Jul 2018
Reading this page: a single is one solve's time · an average is the middle three of five solves, best and worst discarded · a PB is a personal best · a DNF (did not finish) is an attempt with no valid result: a popped piece, an unsolved face, an over-limit memorisation · top X% compares against everyone ever ranked in that event, which is fairer than raw rank because event pools differ tenfold.
The circuit
The people whose scorecards keep turning up next to his.
- Yoochan Hong (홍유찬) — met in 10 rounds, never finished ahead
- DongSoo Park (박동수) — met in 10 rounds, never finished ahead
- JaeYoung Chun (천재영) — met in 9 rounds, finished ahead 5 times
Next targets
- A sub-8 3×3 single — 7,931 people have one; it is 0.16 away.
- A sub-30 4×4 single — 2,388 people have one; it is 7.67 away.
Targets move as he improves.