People · Republic of Korea
Sion Choi
2×2 · top 6.7% of 189,179 all-time · competing since June 2024 · 2024CHOI22
Sion Choi has been competing for 2 years. His best event is the 2×2: a personal-best single of 2.25, set at Okay Okcheon 2026, puts him in the top 6.7% of the 189,179 people who have ever been ranked in the event, and 187th in Republic of Korea. Until February 2008, no official 2×2 solve in the world had been that fast. Across 14 competitions since June 2024, he has put 296 official solves on the record across eleven events. Solve to solve, his 3×3 times vary about 10% around a typical one, steadier than 97% of the 36,406 competitors with ten or more counted rounds. His 3×3 best has come down from 34.90 in June 2024 to 15.78, a 55% improvement. Sion has entered 14 competitions, more competitions than 95% 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 | |
|---|---|---|---|---|---|
| 2×2 | 2.25 | 4.11 | top 6.7% | 187 / 2,334 | |
| Pyraminx | 5.48 | 7.49 | top 16.3% | 259 / 1,294 | |
| 3×3 | 15.78 | 17.79 | top 27.2% | 1,470 / 4,390 | |
| Megaminx | 1:32.31 | 1:50.57 | top 29.8% | 192 / 526 | |
| 3×3 one-handed | 25.36 | 36.21 | top 35.3% | 456 / 981 | |
| Skewb | 7.26 | 9.91 | top 35.8% | 373 / 874 | |
| 4×4 | 1:01.69 | 1:07.96 | top 38.4% | 665 / 1,316 | |
| Clock | 13.92 | 14.78 | top 43.5% | 300 / 541 | |
| 5×5 | 2:02.21 | 2:07.18 | top 50.7% | 425 / 725 | |
| 6×6 | 4:33.69 | — | early days — 2 solves | 273 / 335 | |
| Square-1 | 1:26.78 | — | early days — 2 solves | 369 / 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
- 17 Oct 2026Four personal bests in one day at Okay Okcheon 2026.
- 15 Aug 2026Eight personal bests in one day at Korea Open 2026.
- 26 Apr 2026Four personal bests in one day at Anyang Haseyo 2026.
- 21 Feb 2026Four personal bests in one day at Cube Camp in Jeju 2026.
- 15 Aug 2025First sub-20 3×3: 19.95 at Korea Open 2025.
- 20 Jul 2024First sub-30 3×3: 26.20 at Ansan Summer 2024.
Competitions
- Okay Okcheon 2026 · 17 Oct 2026 — 4 personal bests set
- Ansan Autumn 2026 · 19 Sep 2026
- Korea Open 2026 · 15 Aug 2026 — 8 personal bests set
- Anyang Haseyo 2026 · 26 Apr 2026 — 4 personal bests set
- Cube Camp in Jeju 2026 · 21 Feb 2026 — 4 personal bests set
- Korea Open 2025 · 15 Aug 2025 — 2 personal bests set
- Osan Summer 2025 · 29 Jun 2025
- Korea Newcomers AM 2025 · 8 Mar 2025 — 2 personal bests set
- Happy Suseong 2025 · 18 Jan 2025
- Rubik's WCA Asian Championship 2024 · 1 Nov 2024 — 2 personal bests set
- Daegu Autumn 2024 · 26 Oct 2024 — 2 personal bests set
- Korean Championship 2024 · 15 Aug 2024 — 1 personal best set
- Ansan Summer 2024 · 20 Jul 2024 — 1 personal best set
- Prime Cubing Day Seoul 2024 · 15 Jun 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 67 rounds, finished ahead 3 times
- Choi Goho (최고호) — met in 65 rounds, finished ahead 6 times
- Hyunjo Kim (김현조) — met in 61 rounds, finished ahead 45 times
Next targets
- A sub-2 2×2 single — 9,039 people have one; it is 0.25 away.
- A sub-5 Pyraminx single — 17,242 people have one; it is 0.48 away.
Targets move as he improves.