People · Republic of Korea
SiWoo Choi (최시우)
3×3 · top 1.8% of 288,433 all-time · competing since January 2024 · 2024CHOI02
SiWoo Choi (최시우) has been competing for 3 years. His best event is the 3×3: a personal-best single of 7.33, set at Korea Open 2026, puts him in the top 1.8% of the 288,433 people who have ever been ranked in the event, and 107th in Republic of Korea. Until July 2008, no official 3×3 solve in the world had been that fast. Across 11 competitions since January 2024, he has put 224 official solves on the record across nine events. Solve to solve, his 3×3 times vary about 12% around a typical one, steadier than 75% of the 36,406 competitors with ten or more counted rounds. His 3×3 best has come down from 16.52 in January 2024 to 7.33, a 56% improvement. SiWoo has entered eleven competitions, more competitions than 93% 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 | 7.33 | 9.02 | top 1.8% | 107 / 4,390 | |
| 4×4 | 35.33 | 37.46 | top 7.1% | 149 / 1,316 | |
| 2×2 | 2.73 | 3.56 | top 11.3% | 339 / 2,334 | |
| 3×3 one-handed | 17.13 | 18.46 | top 13.0% | 183 / 981 | |
| Clock | 7.55 | 8.84 | top 13.0% | 91 / 541 | |
| Pyraminx | 5.53 | 7.05 | top 16.7% | 268 / 1,294 | |
| 5×5 | 1:24.55 | 1:33.45 | top 23.0% | 210 / 725 | |
| Megaminx | 1:33.62 | 1:59.02 | top 30.5% | 202 / 526 | |
| Skewb | 7.03 | 9.13 | top 34.0% | 357 / 874 |
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 2026Three personal bests in one day at Korea Open 2026.
- 26 Apr 2026Three personal bests in one day at Anyang Haseyo 2026.
- 15 Aug 2025Five personal bests in one day at Korea Open 2025.
- 8 Mar 2025First sub-10 3×3: 9.06 at Korea Newcomers PM 2025.
- 22 Jun 2024First sub-15 3×3: 13.02 at Korea Qualifier - Seoul C 2024.
- 6 Jan 2024First competition: Seoul Open 2024. A 16.52 3×3 single to start from.
Competitions
- Korea Open 2026 · 15 Aug 2026 — 3 personal bests set
- Seoul Summer 2026 · 19 Jul 2026
- Anyang Haseyo 2026 · 26 Apr 2026 — 3 personal bests set
- Seoul Winter 2026 · 17 Jan 2026 — 2 personal bests set
- Korea Open 2025 · 15 Aug 2025 — 5 personal bests set
- Suwon Summer 2025 · 13 Jul 2025
- Osan Summer 2025 · 29 Jun 2025 — 1 personal best set
- Korea Newcomers PM 2025 · 8 Mar 2025 — 1 personal best set
- Anyang Haseyo 2025 · 8 Feb 2025 — 2 personal bests set
- Korea Qualifier - Seoul C 2024 · 22 Jun 2024 — 1 personal best set
- Seoul Open 2024 · 6 Jan 2024
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 42 rounds, finished ahead 16 times
- Minjun Kim (김민준) — met in 42 rounds, finished ahead 9 times
- Yunsung Nam — met in 40 rounds, finished ahead 3 times
Next targets
- A sub-6 3×3 single — 1,419 people have one; it is 1.33 away.
- A sub-30 4×4 single — 2,465 people have one; it is 5.33 away.
Targets move as he improves.