People · Republic of Korea
Hajoon Chung
3×3 · top 9.5% of 288,433 all-time · competing since August 2025 · 2025CHUN20
Hajoon Chung has been competing for a year. His best event is the 3×3: a personal-best single of 10.67, set at Ansan Favorites 2026, puts him in the top 9.5% of the 288,433 people who have ever been ranked in the event, and 547th in Republic of Korea. Until August 2006, no official 3×3 solve in the world had been that fast. Across 4 competitions since August 2025, he has put 30 official solves on the record across one event. Solve to solve, his 3×3 times vary about 14% around a typical one, an early reading from 6 counted rounds. His 3×3 best has come down from 13.79 in August 2025 to 10.67, a 23% improvement. Hajoon has entered four competitions, more competitions than 78% 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 | 10.67 | 13.33 | top 9.5% | 547 / 4,390 |
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 2025First competition: Korea Open 2025. A 13.79 3×3 single to start from.
Competitions
- Temecula Valley Summer 2026 · 25 Jul 2026
- Seoul Spring 2026 · 22 Mar 2026
- Ansan Favorites 2026 · 7 Feb 2026 — 1 personal best set
- Korea Open 2025 · 15 Aug 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.
- Minjung Kim (김민정) — met in 4 rounds, finished ahead twice
- Yoochan Hong (홍유찬) — met in 4 rounds, never finished ahead
- MinGwan Yeo (여민관) — met in 4 rounds, never finished ahead
Next targets
- A sub-10 3×3 single — 21,606 people have one; it is 0.67 away.
Targets move as he improves.