People · Republic of Korea
Kim Siheon (김시헌)
3×3 · top 9.6% of 288,433 all-time · competing since November 2023 · 2023SIHE01
Kim Siheon (김시헌) has been competing for 3 years. His best event is the 3×3: a personal-best single of 10.70, set at Seoul Winter 2026, puts him in the top 9.6% of the 288,433 people who have ever been ranked in the event, and 555th in Republic of Korea. Until August 2006, no official 3×3 solve in the world had been that fast. Across 5 competitions since November 2023, he has put 113 official solves on the record across nine events. Solve to solve, his 3×3 times vary about 16% around a typical one, an early reading from 5 counted rounds. His 3×3 best has come down from 13.63 in November 2023 to 10.70, a 21% improvement. Kim has entered five competitions, more competitions than 83% 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 | 10.70 | 12.14 | top 9.6% | 555 / 4,390 | |
| 4×4 | 41.45 | 48.66 | top 13.9% | 265 / 1,316 | |
| Pyraminx | 5.60 | 10.26 | top 17.1% | 277 / 1,294 | |
| 3×3 one-handed | 20.29 | 30.37 | top 21.3% | 304 / 981 | |
| 2×2 | 3.64 | 4.31 | top 22.0% | 662 / 2,334 | |
| 5×5 | 1:33.44 | 1:47.48 | top 30.3% | 267 / 725 | |
| Skewb | 6.56 | 7.17 | top 30.3% | 313 / 874 | |
| Clock | 12.11 | 13.62 | top 35.4% | 237 / 541 | |
| Megaminx | 1:42.79 | 1:59.46 | top 36.4% | 241 / 526 |
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
- 13 Jul 2025Three personal bests in one day at Suwon Summer 2025.
- 26 Nov 2023First competition: Shenzhen Youth Open 2023. A 13.63 3×3 single to start from.
Competitions
- Seoul Winter 2026 · 17 Jan 2026 — 2 personal bests set
- Korea Open 2025 · 15 Aug 2025 — 2 personal bests set
- Suwon Summer 2025 · 13 Jul 2025 — 3 personal bests set
- Welcome Back Hong Kong 2024 · 31 Mar 2024 — 2 personal bests set
- Shenzhen Youth Open 2023 · 26 Nov 2023
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.
- Choi Goho (최고호) — met in 16 rounds, finished ahead 6 times
- Oh Chang-Min (오창민) — met in 16 rounds, finished ahead 4 times
- Woobin Hwang (황우빈) — met in 16 rounds, finished ahead once
Next targets
- A sub-10 3×3 single — 21,606 people have one; it is 0.70 away.
- A sub-40 4×4 single — 10,370 people have one; it is 1.45 away.
Targets move as he improves.