People · China
Zhuojian Chen (陈卓坚)
3×3 · top 4.0% of 284,439 all-time · competing since May 2015 · 2015CHEN33
Zhuojian Chen (陈卓坚) has been competing for 11 years. His best event is the 3×3: a personal-best single of 8.62, set at Quabbin Spring 2026, puts him in the top 4.0% of the 284,439 people who have ever been ranked in the event, and 1,515th in China. Until July 2008, no official 3×3 solve in the world had been that fast. Across 7 competitions since May 2015, he has put 186 official solves on the record across seven events. Solve to solve, his 3×3 times vary about 17% around a typical one; 95% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 11.21 in May 2015 to 8.62, a 23% improvement. Zhuojian 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 | China | |
|---|---|---|---|---|---|
| 3×3 | 8.62 | 11.23 | top 4.0% | 1,515 / 28,153 | |
| 5×5 | 58.05 | 1:08.66 | top 4.6% | 218 / 2,816 | |
| 4×4 | 33.66 | 38.87 | top 5.5% | 552 / 5,926 | |
| 6×6 | 2:00.02 | 2:04.57 | top 11.0% | 233 / 1,349 | |
| 3×3 one-handed | 16.61 | 18.50 | top 11.6% | 1,139 / 5,922 | |
| 7×7 | 3:10.90 | 3:23.24 | top 13.6% | 270 / 1,261 | |
| 2×2 | 4.41 | 5.26 | top 31.8% | 5,446 / 15,796 |
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
- 23 May 2026First sub-10 3×3: 8.62 at Quabbin Spring 2026.
- 23 May 2026Four personal bests in one day at Quabbin Spring 2026.
- 9 Sep 2018Three personal bests in one day at Zhongshan NxN Speedcubing 2018.
- 5 Mar 2016Three personal bests in one day at Guangzhou Rubik's Cube Days 2016.
- 2 May 2015First competition: Cube of Prime Numbers 2015. A 11.21 3×3 single to start from.
Competitions
- Hampton Beach Summer 2026 · 1 Aug 2026 — 1 personal best set
- Quabbin Spring 2026 · 23 May 2026 — 4 personal bests set
- Quick in Quincy 2024 · 27 Oct 2024 — 2 personal bests set
- Zhongshan NxN Speedcubing 2018 · 9 Sep 2018 — 3 personal bests set
- Guangzhou Rubik's Cube Days 2016 · 5 Mar 2016 — 3 personal bests set
- Parity Open 2015 · 29 Nov 2015 — 2 personal bests set
- Cube of Prime Numbers 2015 · 2 May 2015
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.
- Mok Man Kit (莫文傑) — met in 25 rounds, finished ahead 7 times
- Ming Zheng (郑鸣) — met in 21 rounds, finished ahead 18 times
- Kailong Li (李开隆) — met in 20 rounds, finished ahead once
Next targets
- A sub-8 3×3 single — 7,931 people have one; it is 0.62 away.
- A sub-50 5×5 single — 713 people have one; it is 8.05 away.
Targets move as he improves.