People · Republic of Korea
Seungjoo Lee (이승주)
3×3 · top 9.8% of 288,433 all-time · competing since October 2022 · 2022LEES09
Seungjoo Lee (이승주) has been competing for 4 years. His best event is the 3×3: a personal-best single of 10.76, set at Seoul Winter 2024, puts him in the top 9.8% of the 288,433 people who have ever been ranked in the event, and 568th in Republic of Korea. Until August 2006, no official 3×3 solve in the world had been that fast. Across 12 competitions since October 2022, he has put 157 official solves on the record across eleven events. Solve to solve, his 3×3 times vary about 13% around a typical one, an early reading from 7 counted rounds. His 3×3 best has come down from 16.93 in April 2023 to 10.76, a 36% improvement. Seungjoo 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 | 10.76 | 15.64 | top 9.8% | 568 / 4,390 | |
| 2×2 | 2.61 | 3.94 | top 10.1% | 297 / 2,334 | |
| Megaminx | 1:34.05 | 1:48.38 | top 30.8% | 206 / 526 | |
| Pyraminx | 7.40 | 10.39 | top 31.2% | 479 / 1,294 | |
| 4×4 | 55.61 | 1:01.51 | top 31.6% | 552 / 1,316 | |
| 3×3 one-handed | 28.98 | 33.23 | top 44.4% | 561 / 981 | |
| 5×5 | 1:54.53 | 1:57.12 | top 45.8% | 388 / 725 | |
| Clock | 14.76 | 16.23 | top 46.9% | 328 / 541 | |
| Skewb | 9.71 | 11.65 | top 53.2% | 516 / 874 | |
| 3×3 Fewest Moves | 43 moves | 48.67 | early days — 3 solves | 117 / 173 | |
| Square-1 | 52.29 | — | early days — 1 solve | 319 / 383 |
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 2025Four personal bests in one day at Korea Open 2025.
- 15 Aug 2024Four personal bests in one day at Korean Championship 2024.
- 12 Aug 2023First sub-15 3×3: 14.70 at Rubik's WCA World Championship 2023.
- 22 Oct 2022First competition: Please Big Cubes Korea 2022.
Competitions
- Berkeley September Weekday 2025 · 19 Sep 2025
- Korea Open 2025 · 15 Aug 2025 — 4 personal bests set
- Please Big Cubes Korea 2025 · 10 May 2025 — 1 personal best set
- Please Minx Korea 2025 · 5 Apr 2025
- Seoul Winter 2024 · 14 Dec 2024 — 1 personal best set
- Korean Championship 2024 · 15 Aug 2024 — 4 personal bests set
- FMC Korea Spring 2024 · 4 May 2024
- Anyang Haseyo 2024 · 9 Mar 2024 — 2 personal bests set
- Rubik's WCA World Championship 2023 · 12 Aug 2023 — 2 personal bests set
- Seoul Spring 2023 · 7 May 2023 — 1 personal best set
- Daegu Hot Spring 2023 · 15 Apr 2023
- Please Big Cubes Korea 2022 · 22 Oct 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.
- Ko Youngjin (고영진) — met in 32 rounds, finished ahead 4 times
- Minseo Gu (구민서) — met in 32 rounds, finished ahead once
- Choi Goho (최고호) — met in 31 rounds, finished ahead 3 times
Next targets
- A sub-10 3×3 single — 21,606 people have one; it is 0.76 away.
- A sub-2 2×2 single — 9,039 people have one; it is 0.61 away.
Targets move as he improves.