People · Republic of Korea
Sejun Yim (임세준)
3×3 · top 16.3% of 284,439 all-time · competing since September 2022 · 2022YIMS01
Sejun Yim (임세준) has been competing for 4 years. His best event is the 3×3: a personal-best single of 12.68, set at Seoul Winter 2024, puts him in the top 16.3% of the 284,439 people who have ever been ranked in the event, and 923rd in Republic of Korea. Across 12 competitions since September 2022, he has put 172 official solves on the record across eleven events. Solve to solve, his 3×3 times vary about 11% around a typical one, an early reading from 6 counted rounds. That figure sets aside his 2 DNFs. His 3×3 best has come down from 25.02 in September 2022 to 12.68, a 49% improvement. Sejun has entered twelve competitions, more competitions than 94% 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 | 12.68 | 15.13 | top 16.3% | 923 / 4,352 | |
| Clock | 9.64 | 10.77 | top 23.3% | 155 / 536 | |
| 2×2 | 3.80 | 4.95 | top 23.9% | 719 / 2,319 | |
| 4×4 | 57.31 | 59.57 | top 33.5% | 583 / 1,308 | |
| Pyraminx | 7.89 | 11.39 | top 35.3% | 526 / 1,271 | |
| Skewb | 7.25 | 11.26 | top 35.6% | 364 / 854 | |
| 5×5 | 1:53.53 | 2:06.76 | top 45.0% | 378 / 716 | |
| Square-1 | 32.92 | 41.03 | top 55.0% | 232 / 371 | |
| Megaminx | 2:40.39 | 2:54.99 | top 66.1% | 385 / 524 | |
| 6×6 | 4:49.56 | 4:59.77 | top 79.5% | 278 / 329 | |
| 7×7 | 8:54.74 | — | early days — 2 solves | 252 / 254 |
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
- 14 Dec 2024Three personal bests in one day at Seoul Winter 2024.
- 3 Feb 2024Three personal bests in one day at Daegu Cold Winter 2024.
- 12 Aug 2023First sub-15 3×3: 14.91 at Rubik's WCA World Championship 2023.
- 26 Mar 2023Three personal bests in one day at Ansan Spring 2023.
- 20 Nov 2022First sub-20 3×3: 18.88 at KAIST Fall 2022.
- 17 Sep 2022First competition: Daegu Hot Autumn 2022. A 25.02 3×3 single to start from.
Competitions
- Korea Open 2025 · 15 Aug 2025 — 1 personal best set
- Daejeon Spring 2025 · 25 May 2025
- Seoul Winter 2024 · 14 Dec 2024 — 3 personal bests set
- Daegu Cold Winter 2024 · 3 Feb 2024 — 3 personal bests set
- Korean Championship 2023 · 15 Dec 2023 — 2 personal bests set
- Ansan Autumn 2023 · 24 Sep 2023 — 2 personal bests set
- Rubik's WCA World Championship 2023 · 12 Aug 2023 — 2 personal bests set
- Daegu Hot Spring 2023 · 15 Apr 2023 — 1 personal best set
- Ansan Spring 2023 · 26 Mar 2023 — 3 personal bests set
- KAIST Fall 2022 · 20 Nov 2022 — 1 personal best set
- Please Big Cubes Korea 2022 · 22 Oct 2022
- Daegu Hot Autumn 2022 · 17 Sep 2022
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.
- DongSoo Park (박동수) — met in 38 rounds, finished ahead once
- MinGwan Yeo (여민관) — met in 36 rounds, finished ahead 4 times
- Minseo Gu (구민서) — met in 36 rounds, finished ahead twice
Next targets
- A sub-12 3×3 single — 39,535 people have one; it is 0.68 away.
- A sub-8 Clock single — 4,877 people have one; it is 1.64 away.
Targets move as he improves.