People · China
Zhenghai Zu (祖正海)
3×3 · top 3.7% of 288,433 all-time · competing since October 2019 · 2019ZUZH01
Zhenghai Zu (祖正海) has been competing for 7 years. His best event is the 3×3: a personal-best single of 8.48, set at Beijing Only 3x3 2025, puts him in the top 3.7% of the 288,433 people who have ever been ranked in the event, and 1,434th in China. Until July 2008, no official 3×3 solve in the world had been that fast. Across 7 competitions since October 2019, he has put 144 official solves on the record across ten 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 16.58 in October 2019 to 8.48, a 49% improvement. Zhenghai 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 | 8.48 | 9.91 | top 3.7% | 1,434 / 28,499 | |
| 3×3 one-handed | 12.52 | 13.94 | top 3.7% | 334 / 5,994 | |
| 4×4 | 35.31 | 39.72 | top 7.1% | 729 / 5,999 | |
| 2×2 | 2.87 | 4.29 | top 12.9% | 2,040 / 15,939 | |
| 5×5 | 1:13.02 | 1:20.88 | top 13.9% | 702 / 2,857 | |
| 3×3 blindfolded | 1:04.50 | 1:53.00 | top 14.5% | 214 / 1,184 | |
| 6×6 | 3:07.49 | — | early days — 1 solve | 876 / 1,363 | |
| 7×7 | 4:47.29 | — | early days — 1 solve | 858 / 1,274 | |
| 3×3 Multi-Blind | 3 of 3 cubes · 12:38 | — | early days — 2 solves | 140 / 279 | |
| 3×3 Fewest Moves | 45 moves | — | early days — 2 solves | 787 / 1,071 |
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
- 26 May 2024First sub-15 3×3: 9.53 at Guiyang Open 2024.
- 26 May 2024First sub-10 3×3: 9.53 at Guiyang Open 2024.
- 26 May 2024Four personal bests in one day at Guiyang Open 2024.
- 6 Oct 2019First competition: Yunnan Open 2019. A 16.58 3×3 single to start from.
Competitions
- Please Don't DNF Beijing 2026 · 16 May 2026 — 2 personal bests set
- Xuzhou Zenith 2026 · 11 Apr 2026 — 2 personal bests set
- Beijing Only 3x3 2025 · 23 Nov 2025 — 2 personal bests set
- Beijing Summer 2025 · 17 May 2025 — 2 personal bests set
- Xi'an Cherry Blossom 2025 · 4 Apr 2025
- Guiyang Open 2024 · 26 May 2024 — 4 personal bests set
- Yunnan Open 2019 · 6 Oct 2019
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.
- Yifan Wang (王逸帆) — met in 29 rounds, finished ahead 9 times
- Aolin Tang (唐奥林) — met in 23 rounds, finished ahead 3 times
- Zicong Liu (刘子聪) — met in 22 rounds, finished ahead 6 times
Next targets
- A sub-8 3×3 single — 8,101 people have one; it is 0.48 away.
- A sub-12 3×3 one-handed single — 2,239 people have one; it is 0.52 away.
Targets move as he improves.