People · Republic of Korea
Kyungjoon Cho (조경준)
3×3 · top 4.5% of 284,439 all-time · competing since August 2022 · 2022CHOK03
Kyungjoon Cho (조경준) has been competing for 4 years. His best event is the 3×3: a personal-best single of 8.84, set at Seoul Open 2024, puts him in the top 4.5% of the 284,439 people who have ever been ranked in the event, and 271st in Republic of Korea. Until May 2008, no official 3×3 solve in the world had been that fast. Across 13 competitions since August 2022, he has put 190 official solves on the record across eleven events. Solve to solve, his 3×3 times vary about 15% around a typical one; 82% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 23.20 in August 2022 to 8.84, a 62% improvement. Kyungjoon has entered 13 competitions, more competitions than 94% 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 | 8.84 | 12.27 | top 4.5% | 271 / 4,352 | |
| 2×2 | 3.09 | 3.77 | top 15.3% | 459 / 2,319 | |
| Skewb | 5.29 | 7.35 | top 20.4% | 208 / 854 | |
| 4×4 | 53.11 | 56.92 | top 28.5% | 507 / 1,308 | |
| Pyraminx | 8.32 | 10.78 | top 39.0% | 579 / 1,271 | |
| 5×5 | 2:12.01 | 2:17.70 | top 56.5% | 458 / 716 | |
| Clock | 20.43 | 22.96 | top 65.9% | 416 / 536 | |
| 6×6 | 4:39.38 | 4:48.51 | top 77.1% | 271 / 329 | |
| Square-1 | 1:01.24 | 1:32.02 | top 84.4% | 334 / 371 | |
| Megaminx | 4:16.10 | 4:47.49 | top 92.3% | 498 / 524 | |
| 7×7 | 8:48.52 | — | early days — 2 solves | 251 / 254 |
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
- 6 Jan 2024First sub-10 3×3: 8.84 at Seoul Open 2024.
- 18 Nov 2023Four personal bests in one day at Hamchang Open 2023.
- 28 Sep 2023Three personal bests in one day at Australian Nationals 2023.
- 12 Aug 2023First sub-15 3×3: 12.06 at Rubik's WCA World Championship 2023.
- 12 Aug 2023Three personal bests in one day at Rubik's WCA World Championship 2023.
- 29 Oct 2022First sub-20 3×3: 15.16 at Cubing SimCheong Open 2022.
Competitions
- Seoul Spring 2026 · 22 Mar 2026 — 2 personal bests set
- Brown Fall Seongnam 2024 · 21 Sep 2024 — 1 personal best set
- Anyang Haseyo 2024 · 9 Mar 2024
- Seoul Open 2024 · 6 Jan 2024 — 1 personal best set
- Hamchang Open 2023 · 18 Nov 2023 — 4 personal bests set
- Australian Nationals 2023 · 28 Sep 2023 — 3 personal bests set
- Rubik's WCA World Championship 2023 · 12 Aug 2023 — 3 personal bests set
- Ansan Spring 2023 · 26 Mar 2023
- Please Be Quiet Daegu 2023 · 25 Feb 2023
- Cubing SimCheong Open 2022 · 29 Oct 2022 — 3 personal bests set
- Please Big Cubes Korea 2022 · 22 Oct 2022
- Daegu Hot Autumn 2022 · 17 Sep 2022 — 1 personal best set
- Korean Championship 2022 · 12 Aug 2022
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 43 rounds, finished ahead 4 times
- DongSoo Park (박동수) — met in 43 rounds, never finished ahead
- MinGwan Yeo (여민관) — met in 41 rounds, finished ahead 4 times
Next targets
- A sub-8 3×3 single — 7,931 people have one; it is 0.84 away.
- A sub-3 2×2 single — 26,570 people have one; it is 0.09 away.
Targets move as he improves.