People · China
Jiakai Chen (陈佳凯)
3×3 · top 5.6% of 284,439 all-time · competing since August 2010 · 2010CHEN30
Jiakai Chen (陈佳凯) has been competing for 16 years. His best event is the 3×3: a personal-best single of 9.30, set at Shantou Open 2013, puts him in the top 5.6% of the 284,439 people who have ever been ranked in the event, and 2,161st in China. Until February 2008, no official 3×3 solve in the world had been that fast. Across 15 competitions since August 2010, he has put 384 official solves on the record across eight events. Solve to solve, his 3×3 times vary about 13% around a typical one; 51% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 10.86 in August 2010 to 9.30, a 14% improvement. Jiakai has entered 15 competitions, more competitions than 95% 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 | 9.30 | 10.94 | top 5.6% | 2,161 / 28,153 | |
| 2×2 | 2.38 | 6.42 | top 7.8% | 1,121 / 15,796 | |
| 4×4 | 37.41 | 43.95 | top 9.1% | 964 / 5,926 | |
| 3×3 one-handed | 16.69 | 19.09 | top 11.8% | 1,155 / 5,922 | |
| Pyraminx | 9.47 | 12.45 | top 48.8% | 5,140 / 10,224 | |
| 5×5 | 2:34.38 | — | early days — 2 solves | 2,534 / 2,816 | |
| Square-1 | 46.42 | — | early days — 2 solves | 1,177 / 1,362 | |
| Megaminx | 3:23.55 | — | early days — 2 solves | 1,607 / 1,678 |
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
- 27 Oct 2013Five personal bests in one day at Nanchang Open 2013.
- 19 Jul 2013First sub-10 3×3: 9.86 at Shantou Open 2013.
- 19 Jul 2013Five personal bests in one day at Shantou Open 2013.
- 8 Aug 2010First competition: Shantou Open 2010. A 12.03 3×3 single to start from.
- 8 Aug 2010Three personal bests in one day at Shantou Open 2010.
Competitions
- Guangzhou Rubik's Cube Days 2016 · 5 Mar 2016
- China Championship 2015 · 2 Oct 2015
- Shantou Open 2015 · 2 Aug 2015
- Huizhou Open 2015 · 26 Jul 2015
- Guangzhou More Fun Site 2015 · 15 Mar 2015
- Guangzhou New Year's Cube Day 2015 · 1 Jan 2015
- Guangdong Open 2014 · 1 Oct 2014
- Shantou Open 2014 · 3 Aug 2014
- Guangzhou Wushan Open 2014 · 18 May 2014
- Guangzhou Cube Splashing Day 2014 · 20 Apr 2014
- Guangzhou Big Cubes 2013 · 1 Dec 2013 — 1 personal best set
- Nanchang Open 2013 · 27 Oct 2013 — 5 personal bests set
- Guangzhou CCSA Championship 2013 · 22 Jul 2013
- Shantou Open 2013 · 19 Jul 2013 — 5 personal bests set
- Shantou Open 2010 · 8 Aug 2010 — 3 personal bests set
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.
- Ziyuan Lin (林子源) — met in 52 rounds, finished ahead 35 times
- Xusheng Hong (洪旭升) — met in 46 rounds, finished ahead 38 times
- Jiacheng Peng (彭家诚) — met in 43 rounds, finished ahead 24 times
Next targets
- A sub-8 3×3 single — 7,931 people have one; it is 1.30 away.
- A sub-2 2×2 single — 8,848 people have one; it is 0.38 away.
Targets move as he improves.