People · Republic of Korea
Junhyuk Choi (최준혁)
Clock · top 4.0% of 32,048 all-time · competing since December 2021 · 2021CHOI04
Junhyuk Choi (최준혁) has been competing for 5 years. His best event is the Clock: a personal-best single of 4.84, set at Korea Open 2025, puts him in the top 4.0% of the 32,048 people who have ever been ranked in the event, and 22nd in Republic of Korea. Until April 2015, no official Clock solve in the world had been that fast. Across 13 competitions since December 2021, he has put 180 official solves on the record across four events. Solve to solve, his 3×3 times vary about 14% around a typical one; 74% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 12.84 in December 2021 to 8.76, a 32% improvement. Junhyuk has entered 13 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 | |
|---|---|---|---|---|---|
| Clock | 4.84 | 6.37 | top 4.0% | 22 / 536 | |
| 3×3 | 8.76 | 9.53 | top 4.3% | 257 / 4,352 | |
| 2×2 | 2.42 | 3.77 | top 8.1% | 230 / 2,319 | |
| 4×4 | 56.36 | 59.20 | top 32.3% | 559 / 1,308 |
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 2024Three personal bests in one day at Korean Championship 2024.
- 15 Dec 2023First sub-10 3×3: 9.49 at Korean Championship 2023.
- 18 Dec 2021First competition: Korean Championship Mini 2021. A 12.84 3×3 single to start from.
Competitions
- Korea Open 2025 · 15 Aug 2025 — 1 personal best set
- Happy Suseong 2025 · 18 Jan 2025 — 1 personal best set
- Brown Fall Seongnam 2024 · 21 Sep 2024 — 1 personal best set
- Korean Championship 2024 · 15 Aug 2024 — 3 personal bests set
- Korea Qualifier - Seoul A 2024 · 22 Jun 2024
- Anyang Haseyo 2024 · 9 Mar 2024
- Korean Championship 2023 · 15 Dec 2023 — 1 personal best set
- Rubik's WCA World Championship 2023 · 12 Aug 2023
- Daegu Hot Spring 2023 · 15 Apr 2023 — 2 personal bests set
- Cubing SimCheong Open 2022 · 29 Oct 2022
- Korean Championship 2022 · 12 Aug 2022
- Korean Spring 2022 · 29 May 2022 — 1 personal best set
- Korean Championship Mini 2021 · 18 Dec 2021
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.
- On Yu (온유) — met in 33 rounds, finished ahead 3 times
- Yeeun Park (박예은) — met in 31 rounds, finished ahead 14 times
- Ko Youngjin (고영진) — met in 31 rounds, finished ahead 10 times
Next targets
- A sub-4 Clock single — 741 people have one; it is 0.84 away.
- A sub-8 3×3 single — 7,931 people have one; it is 0.76 away.
Targets move as he improves.