People · Republic of Korea
Jaehyuk Lee (이재혁)
Square-1 · top 1.1% of 25,272 all-time · competing since January 2019 · 2019JAEH01
Jaehyuk Lee (이재혁) has been competing for 8 years. His best event is the Square-1: a personal-best single of 6.42, set at Korean Championship 2024, puts him in the top 1.1% of the 25,272 people who have ever been ranked in the event, and 6th in Republic of Korea. Until May 2017, no official Square-1 solve in the world had been that fast. Across 6 competitions since January 2019, he has put 90 official solves on the record across six events. His Square-1 best has come down from 10.22 in July 2022 to 6.42, a 37% improvement. Jaehyuk has entered six competitions, more competitions than 86% 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 | |
|---|---|---|---|---|---|
| Square-1 | 6.42 | 7.71 | top 1.1% | 6 / 371 | |
| 3×3 | 10.90 | 13.54 | top 10.2% | 582 / 4,352 | |
| 5×5 | 1:25.00 | 1:45.70 | top 23.3% | 216 / 716 | |
| 4×4 | 53.51 | 58.29 | top 29.0% | 516 / 1,308 | |
| 3×3 one-handed | 25.86 | 27.82 | top 36.5% | 465 / 966 | |
| 2×2 | 5.25 | 6.42 | top 42.4% | 1,230 / 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, Square-1. Faster is higher — the axis is the right way up.
The story so far
- 23 Jul 2022Three personal bests in one day at Seoul Summer 2022.
- 16 Aug 2019First sub-20 3×3: 13.52 at Korean Championship 2019.
- 16 Aug 2019First sub-15 3×3: 13.52 at Korean Championship 2019.
- 16 Aug 2019Three personal bests in one day at Korean Championship 2019.
- 19 Jan 2019First competition: Korea Winter 2019. A 20.17 3×3 single to start from.
Competitions
- Korea Open 2025 · 15 Aug 2025
- Korean Championship 2024 · 15 Aug 2024 — 2 personal bests set
- Hamchang Open 2023 · 18 Nov 2023 — 1 personal best set
- Seoul Summer 2022 · 23 Jul 2022 — 3 personal bests set
- Korean Championship 2019 · 16 Aug 2019 — 3 personal bests set
- Korea Winter 2019 · 19 Jan 2019
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 17 rounds, finished ahead 5 times
- Choi Goho (최고호) — met in 16 rounds, finished ahead 5 times
- Ko Youngjin (고영진) — met in 16 rounds, finished ahead 4 times
Next targets
- A sub-6 Square-1 single — 201 people have one; it is 0.42 away.
- A sub-10 3×3 single — 21,172 people have one; it is 0.90 away.
Targets move as he improves.