People · China
Jiacheng Cai (蔡嘉成)
4×4 · top 1.9% of 85,040 all-time · competing since May 2017 · 2017CAIJ02
Jiacheng Cai (蔡嘉成) has been competing for 9 years. His best event is the 4×4: a personal-best single of 28.25, set at Foshan Open 2026, puts him in the top 1.9% of the 85,040 people who have ever been ranked in the event, and 184th in China. Until April 2012, no official 4×4 solve in the world had been that fast. Across 24 competitions since May 2017, he has put 549 official solves on the record across five events. Solve to solve, his 3×3 times vary about 11% around a typical one, steadier than 88% of the 36,406 competitors with ten or more counted rounds. His 3×3 best has come down from 12.82 in May 2017 to 8.13, a 37% improvement. Jiacheng has entered 24 competitions, more competitions than 97% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | China | |
|---|---|---|---|---|---|
| 4×4 | 28.25 | 31.05 | top 1.9% | 184 / 5,999 | |
| 3×3 | 8.13 | 9.75 | top 3.0% | 1,131 / 28,499 | |
| 5×5 | 54.41 | 57.95 | top 3.2% | 151 / 2,857 | |
| 6×6 | 2:25.07 | 2:36.68 | early days — 3 solves | 517 / 1,363 | |
| 2×2 | 4.92 | 6.44 | top 38.4% | 6,696 / 15,939 |
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
- 18 Nov 2018First sub-10 3×3: 9.77 at Shenzhen Nanshan 2018.
- 10 Feb 2018Three personal bests in one day at Yangjiang Open 2018.
- 29 May 2017First competition: Zhuhai Open 2017. A 15.33 3×3 single to start from.
- 29 May 2017First sub-15 3×3: 12.82 at Zhuhai Open 2017.
Competitions
- Guangzhou Grand Open 2026 · 5 Oct 2026 — 1 personal best set
- Foshan Open 2026 · 2 May 2026 — 1 personal best set
- Guangdong Open - Revival & Rival 2026 · 6 Feb 2026 — 1 personal best set
- Shenzhen Open 2024 · 7 Dec 2024
- Guangzhou Big Cubes 2024 · 18 Aug 2024 — 1 personal best set
- Shenzhen Nanshan Open 2024 · 22 Jun 2024
- Shenzhen Open 2023 · 24 Dec 2023 — 1 personal best set
- Guangdong Open 2021 · 1 May 2021
- Shenzhen Nanshan Afternoon 2021 · 28 Mar 2021
- Shenzhen Good Afternoon 2021 · 9 Jan 2021 — 2 personal bests set
- Zhongshan NxN Speedcubing 2019 · 27 Oct 2019 — 2 personal bests set
- Shenzhen Open 2019 · 21 Sep 2019
- Shenzhen Cubing 10th Anniversary 2019 · 24 Aug 2019 — 1 personal best set
- GDSY Open 2019 · 23 Mar 2019 — 2 personal bests set
- Shenzhen Nanshan 2018 · 18 Nov 2018 — 2 personal bests set
- Shenzhen Open 2018 · 21 Jul 2018 — 2 personal bests set
- GDSY Open 2018 · 24 Mar 2018
- Dongguan Open 2018 · 4 Mar 2018
- Yangjiang Open 2018 · 10 Feb 2018 — 3 personal bests set
- Big 'n Blind 2017 · 10 Dec 2017 — 1 personal best set
- Shenzhen Open 2017 · 3 Dec 2017 — 1 personal best set
- China's 10th Anniversary Championship 2017 · 1 Oct 2017
- Shantou Open 2017 · 20 Aug 2017 — 1 personal best set
- Zhuhai Open 2017 · 29 May 2017 — 2 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.
- Xusheng Hong (洪旭升) — met in 65 rounds, finished ahead 62 times
- Zijian Cai (蔡子健) — met in 65 rounds, finished ahead 5 times
- Junliang Huang (黄骏亮) — met in 59 rounds, finished ahead 4 times
Next targets
- A sub-25 4×4 single — 614 people have one; it is 3.25 away.
- A sub-8 3×3 single — 8,101 people have one; it is 0.13 away.
Targets move as he improves.