People · Republic of Korea
Hajoon Cho
3×3 · top 29.1% of 288,433 all-time · competing since September 2025 · 2025CHOH05
Hajoon Cho has been competing for a year. His best event is the 3×3: a personal-best single of 16.36, set at MYHM UoSM Final Cube Open 2026, puts him in the top 29.1% of the 288,433 people who have ever been ranked in the event, and 1,576th in Republic of Korea. Across 7 competitions since September 2025, he has put 148 official solves on the record across seven events. Solve to solve, his 3×3 times vary about 15% around a typical one, an early reading from 6 counted rounds. His 2×2 best has come down from 21.32 in September 2025 to 4.54, a 79% improvement. Hajoon has entered seven competitions, more competitions than 88% 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 | 16.36 | 18.35 | top 29.1% | 1,576 / 4,390 | |
| 2×2 | 4.54 | 5.83 | top 33.5% | 1,002 / 2,334 | |
| Clock | 12.74 | 27.38 | top 38.5% | 259 / 541 | |
| Skewb | 7.75 | 9.23 | top 39.5% | 402 / 874 | |
| 3×3 one-handed | 28.52 | 35.45 | top 43.3% | 548 / 981 | |
| Pyraminx | 9.25 | 13.96 | top 47.0% | 703 / 1,294 | |
| 4×4 | 1:22.11 | 1:28.62 | top 57.7% | 933 / 1,316 |
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, 2×2. Faster is higher — the axis is the right way up.
The story so far
- 25 Jul 2026Three personal bests in one day at Selangor Cube Open 2026.
- 9 Jul 2026Three personal bests in one day at Australian Nationals 2026.
- 4 Apr 2026Five personal bests in one day at MYHM UoSM Final Cube Open 2026.
- 28 Feb 2026First sub-30 3×3: 16.49 at XMUM Cube Open 2026.
- 28 Feb 2026First sub-20 3×3: 16.49 at XMUM Cube Open 2026.
- 28 Sep 2025First competition: PHS Johor Cube Open 2025. A 30.29 3×3 single to start from.
Competitions
- Mofunland Speedcubing Singapore 2026 · 5 Sep 2026
- Selangor Cube Open 2026 · 25 Jul 2026 — 3 personal bests set
- Australian Nationals 2026 · 9 Jul 2026 — 3 personal bests set
- NUS Mega Challenge 2026 · 14 Jun 2026 — 1 personal best set
- MYHM UoSM Final Cube Open 2026 · 4 Apr 2026 — 5 personal bests set
- XMUM Cube Open 2026 · 28 Feb 2026 — 2 personal bests set
- PHS Johor Cube Open 2025 · 28 Sep 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.
- Ng Jia Quan (黄佳铨) — met in 32 rounds, never finished ahead
- Glen Goh Wee Zhuan (吴洧全) — met in 24 rounds, finished ahead 16 times
- Lim Hung (林弘) — met in 23 rounds, never finished ahead
Next targets
- A sub-15 3×3 single — 70,740 people have one; it is 1.36 away.
- A sub-4 2×2 single — 50,215 people have one; it is 0.54 away.
Targets move as he improves.