People · Republic of Korea
E-chan Jeon (전이찬)
Clock · top 0.81% of 32,048 all-time · competing since August 2019 · 2019JEON05
E-chan Jeon (전이찬) has been competing for 7 years. His best event is the Clock: a personal-best single of 3.05, set at Korea Open 2025, puts him in the top 0.81% of the 32,048 people who have ever been ranked in the event, and 7th in Republic of Korea. Until May 2021, no official Clock solve in the world had been that fast. Across 12 competitions since August 2019, he has put 417 official solves on the record across twelve events. Solve to solve, his 3×3 times vary about 9% around a typical one, steadier than 98% of the 35,811 competitors with ten or more counted rounds. His 3×3 best has come down from 22.50 in August 2019 to 7.12, a 68% improvement. He has entered twelve 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 | |
|---|---|---|---|---|---|
| Clock | 3.05 | 3.94 | top 0.81% | 7 / 536 | |
| 3×3 | 7.12 | 8.65 | top 1.5% | 93 / 4,352 | |
| 2×2 | 1.44 | 1.82 | top 1.9% | 53 / 2,319 | |
| Skewb | 2.76 | 4.11 | top 3.9% | 43 / 854 | |
| 4×4 | 32.99 | 37.75 | top 4.9% | 102 / 1,308 | |
| Pyraminx | 3.56 | 5.63 | top 5.7% | 100 / 1,271 | |
| 3×3 one-handed | 14.37 | 18.00 | top 6.8% | 92 / 966 | |
| 5×5 | 1:04.09 | 1:16.99 | top 7.8% | 81 / 716 | |
| Square-1 | 11.41 | 16.09 | top 8.7% | 35 / 371 | |
| Megaminx | 1:06.14 | 1:13.89 | top 13.4% | 89 / 524 | |
| 3×3 blindfolded | 1:30.56 | — | early days — 2 solves | 63 / 217 | |
| 7×7 | 4:36.17 | 5:01.13 | early days — 3 solves | 140 / 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
- 15 Aug 2025Seven personal bests in one day at Korea Open 2025.
- 15 Aug 2024Six personal bests in one day at Korean Championship 2024.
- 12 Aug 2023Three personal bests in one day at Rubik's WCA World Championship 2023.
- 12 Aug 2022First sub-10 3×3: 9.11 at Korean Championship 2022.
- 23 Jul 2022First sub-20 3×3: 11.93 at Seoul Summer 2022.
- 23 Jul 2022First sub-15 3×3: 11.93 at Seoul Summer 2022.
Competitions
- Korean Championship 2025 · 27 Dec 2025 — 1 personal best set
- Korea Open 2025 · 15 Aug 2025 — 7 personal bests set
- Suwon Summer 2025 · 13 Jul 2025 — 1 personal best set
- Brown Fall Seongnam 2024 · 21 Sep 2024
- Korean Championship 2024 · 15 Aug 2024 — 6 personal bests set
- Korean Championship 2023 · 15 Dec 2023
- Ansan Autumn 2023 · 24 Sep 2023 — 1 personal best set
- Rubik's WCA World Championship 2023 · 12 Aug 2023 — 3 personal bests set
- Seoul Spring 2023 · 7 May 2023 — 2 personal bests set
- Korean Championship 2022 · 12 Aug 2022 — 2 personal bests set
- Seoul Summer 2022 · 23 Jul 2022 — 2 personal bests set
- Korean Championship 2019 · 16 Aug 2019
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.
- Minseo Gu (구민서) — met in 79 rounds, finished ahead 26 times
- DongSoo Park (박동수) — met in 73 rounds, finished ahead 13 times
- Ko Youngjin (고영진) — met in 68 rounds, finished ahead 44 times
Next targets
- A sub-3 Clock single — 239 people have one; it is 0.05 away.
- A sub-6 3×3 single — 1,376 people have one; it is 1.12 away.
Targets move as he improves.