People · China
Kai Jiang (蒋凯)
2×2 · top 1.9% of 186,767 all-time · competing since September 2025 · 2025JIAN23
Kai Jiang (蒋凯) has been competing for a year. His best event is the 2×2: a personal-best single of 1.45, set at Ningbo Autumn 2025, puts him in the top 1.9% of the 186,767 people who have ever been ranked in the event, and 221st in China. Until November 2008, no official 2×2 solve in the world had been that fast. Across 3 competitions since September 2025, he has put 36 official solves on the record across five events. Kai has entered three competitions, more competitions than 69% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | China | |
|---|---|---|---|---|---|
| 2×2 | 1.45 | 4.74 | top 1.9% | 221 / 15,796 | |
| 3×3 | 9.87 | 11.55 | top 7.1% | 2,756 / 28,153 | |
| 4×4 | 39.69 | 43.26 | top 11.8% | 1,254 / 5,926 | |
| 5×5 | 1:14.63 | 1:19.46 | top 15.0% | 730 / 2,816 | |
| 6×6 | 2:30.25 | — | early days — 2 solves | 552 / 1,349 |
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
- 29 Nov 2025First sub-10 3×3: 9.87 at Hangzhou Winter 2025.
- 13 Sep 2025First competition: Ningbo Autumn 2025. A 10.32 3×3 single to start from.
Competitions
- Quanzhou Big Cubes 2026 · 1 Mar 2026
- Hangzhou Winter 2025 · 29 Nov 2025 — 1 personal best set
- Ningbo Autumn 2025 · 13 Sep 2025
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.
- Jiashun Wu (吴嘉顺) — met in 9 rounds, finished ahead 4 times
- Zhedong Wang (王哲栋) — met in 9 rounds, finished ahead once
- Haidong Feng (冯海栋) — met in 9 rounds, finished ahead once
Next targets
- A sub-1 2×2 single — 1,032 people have one; it is 0.45 away.
- A sub-8 3×3 single — 7,931 people have one; it is 1.87 away.
Targets move as he improves.