People · China
Siheng Chen (陈思衡)
3×3 · top 3.2% of 284,439 all-time · competing since March 2021 · 2021CHEN15
Siheng Chen (陈思衡) has been competing for 5 years. His best event is the 3×3: a personal-best single of 8.22, set at Beijing University Cube League 2025, puts him in the top 3.2% of the 284,439 people who have ever been ranked in the event, and 1,175th in China. Until July 2008, no official 3×3 solve in the world had been that fast. Across 5 competitions since March 2021, he has put 108 official solves on the record across seven events. Solve to solve, his 3×3 times vary about 12% around a typical one, an early reading from 7 counted rounds. His 3×3 best has come down from 13.65 in March 2021 to 8.22, a 40% improvement. Siheng has entered five competitions, more competitions than 83% 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 | 8.22 | 10.05 | top 3.2% | 1,175 / 28,153 | |
| Clock | 5.26 | 6.16 | top 5.1% | 96 / 1,843 | |
| 4×4 | 35.96 | 43.81 | top 7.6% | 786 / 5,926 | |
| 5×5 | 1:09.73 | 1:17.15 | top 11.4% | 560 / 2,816 | |
| 7×7 | 3:18.81 | 3:29.90 | early days — 3 solves | 331 / 1,261 | |
| 6×6 | 2:14.86 | 2:22.06 | early days — 3 solves | 390 / 1,349 | |
| Pyraminx | 7.15 | 8.06 | top 29.1% | 3,223 / 10,224 |
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
- 25 Oct 2025First sub-10 3×3: 9.70 at Beijing University Cube League 2025.
- 25 Oct 2025Three personal bests in one day at Beijing University Cube League 2025.
- 1 May 2021Three personal bests in one day at Guangdong Open 2021.
- 28 Mar 2021First competition: Shenzhen Nanshan Afternoon 2021. A 13.65 3×3 single to start from.
Competitions
- Beijing Winter 2026 · 10 Jan 2026
- Beijing University Cube League 2025 · 25 Oct 2025 — 3 personal bests set
- Beijing Spring Open 2025 · 20 Apr 2025 — 1 personal best set
- Guangdong Open 2021 · 1 May 2021 — 3 personal bests set
- Shenzhen Nanshan Afternoon 2021 · 28 Mar 2021
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.
- Xiang Li (李响) — met in 15 rounds, finished ahead 15 times
- Jiazhou Li (李佳洲) — met in 15 rounds, finished ahead once
- Xiwen Ruan (阮熙文) — met in 14 rounds, finished ahead 7 times
Next targets
- A sub-8 3×3 single — 7,931 people have one; it is 0.22 away.
- A sub-5 Clock single — 1,421 people have one; it is 0.26 away.
Targets move as he improves.