People · Republic of Korea
Kim Jaeheon (김재헌)
2×2 · top 4.7% of 189,179 all-time · competing since May 2025 · 2025JAEH01
Kim Jaeheon (김재헌) has been competing for a year. His best event is the 2×2: a personal-best single of 1.98, set at Suwon Summer 2025, puts him in the top 4.7% of the 189,179 people who have ever been ranked in the event, and 128th in Republic of Korea. Until February 2008, no official 2×2 solve in the world had been that fast. Across 2 competitions since May 2025, he has put 37 official solves on the record across four events. Kim has entered two competitions.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | Republic of Korea | |
|---|---|---|---|---|---|
| 2×2 | 1.98 | 6.50 | top 4.7% | 128 / 2,334 | |
| 3×3 | 11.27 | 13.47 | top 11.4% | 648 / 4,390 | |
| 4×4 | 49.36 | 55.36 | top 24.0% | 425 / 1,316 | |
| Square-1 | 1:37.75 | — | early days — 2 solves | 377 / 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
- 13 Jul 2025Three personal bests in one day at Suwon Summer 2025.
- 25 May 2025First competition: Daejeon Spring 2025. A 11.44 3×3 single to start from.
Competitions
- Suwon Summer 2025 · 13 Jul 2025 — 3 personal bests set
- Daejeon Spring 2025 · 25 May 2025
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 8 rounds, finished ahead once
- Ko Youngjin (고영진) — met in 8 rounds, never finished ahead
- Seung Hyuk Nahm (남승혁) — met in 8 rounds, never finished ahead
Next targets
- A sub-1 2×2 single — 1,050 people have one; it is 0.98 away.
- A sub-10 3×3 single — 21,606 people have one; it is 1.27 away.
Targets move as he improves.