People · China
Jiayin Xu (徐嘉胤)
Pyraminx · top 2.4% of 129,321 all-time · competing since April 2018 · 2018XUJI04
Jiayin Xu (徐嘉胤) has been competing for 8 years. His best event is the Pyraminx: a personal-best single of 2.57, set at Hefei Spring 2019, puts him in the top 2.4% of the 129,321 people who have ever been ranked in the event, and 284th in China. Until January 2011, no official Pyraminx solve in the world had been that fast. Across 5 competitions since April 2018, he has put 213 official solves on the record across nine events. Solve to solve, his 3×3 times vary about 11% around a typical one, an early reading from 9 counted rounds. His Pyraminx best has come down from 6.03 in April 2018 to 2.57, a 57% improvement. Jiayin 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 | |
|---|---|---|---|---|---|
| Pyraminx | 2.57 | 6.02 | top 2.4% | 284 / 10,224 | |
| 3×3 | 12.18 | 14.34 | top 14.5% | 5,718 / 28,153 | |
| 2×2 | 3.31 | 4.03 | top 17.9% | 2,901 / 15,796 | |
| Skewb | 5.24 | 6.25 | top 20.1% | 1,239 / 5,004 | |
| 4×4 | 50.41 | 56.07 | top 25.2% | 2,678 / 5,926 | |
| Megaminx | 1:33.77 | 1:45.62 | top 30.5% | 914 / 1,678 | |
| 3×3 one-handed | 25.46 | 27.91 | top 35.4% | 3,355 / 5,922 | |
| 5×5 | 2:11.26 | — | early days — 2 solves | 2,261 / 2,816 | |
| Clock | 19.79 | 20.80 | top 64.0% | 1,424 / 1,843 |
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, Pyraminx. Faster is higher — the axis is the right way up.
The story so far
- 23 Mar 2019Eleven personal bests in one day at Hefei Spring 2019.
- 14 Jul 2018First sub-15 3×3: 14.33 at Hefei Summer 2018.
- 14 Jul 2018Five personal bests in one day at Hefei Summer 2018.
- 30 Apr 2018First competition: Nanjing Spring 2018. A 17.62 3×3 single to start from.
Competitions
- Hefei Open 2025 · 25 Oct 2025
- AHAU Open 2019 · 19 May 2019 — 2 personal bests set
- Hefei Spring 2019 · 23 Mar 2019 — 11 personal bests set
- Hefei Summer 2018 · 14 Jul 2018 — 5 personal bests set
- Nanjing Spring 2018 · 30 Apr 2018 — 1 personal best 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.
- Yuxiao Lu (陆语骁) — met in 35 rounds, finished ahead 8 times
- Xingkai Yin (尹星凯) — met in 31 rounds, never finished ahead
- Weiwen Zhang (章巍玟) — met in 30 rounds, finished ahead 5 times
Next targets
- A sub-2 Pyraminx single — 1,476 people have one; it is 0.57 away.
- A sub-12 3×3 single — 39,535 people have one; it is 0.18 away.
Targets move as he improves.