People · China
Zhenxin Chai (柴振鑫)
2×2 · top 4.9% of 186,767 all-time · competing since December 2011 · 2011CHAI02
Zhenxin Chai (柴振鑫) has been competing for 15 years. His best event is the 2×2: a personal-best single of 2.02, set at Lanzhou Spring 2019, puts him in the top 4.9% of the 186,767 people who have ever been ranked in the event, and 676th in China. Until February 2008, no official 2×2 solve in the world had been that fast. Across 13 competitions since December 2011, he has put 408 official solves on the record across twelve events. Solve to solve, his 3×3 times vary about 15% around a typical one; 79% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 25.86 in December 2011 to 10.41, a 60% improvement. Zhenxin has entered 13 competitions, more competitions than 94% 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 | 2.02 | 4.33 | top 4.9% | 676 / 15,796 | |
| 3×3 | 10.41 | 13.10 | top 8.7% | 3,391 / 28,153 | |
| 4×4 | 37.55 | 44.11 | top 9.3% | 980 / 5,926 | |
| 3×3 one-handed | 17.03 | 26.95 | top 12.6% | 1,242 / 5,922 | |
| 5×5 | 1:19.93 | 1:32.17 | top 19.0% | 912 / 2,816 | |
| Megaminx | 1:52.68 | 2:04.70 | top 41.9% | 1,184 / 1,678 | |
| Square-1 | 27.46 | 41.87 | top 44.5% | 765 / 1,362 | |
| 7×7 | 4:45.65 | 4:53.60 | early days — 3 solves | 838 / 1,261 | |
| 3×3 blindfolded | 2:49.59 | — | top 49.5% | 689 / 1,183 | |
| Clock | 16.81 | 22.69 | top 54.8% | 1,269 / 1,843 | |
| Pyraminx | 10.75 | 15.96 | top 58.7% | 6,064 / 10,224 | |
| 6×6 | 4:40.80 | — | early days — 1 solve | 1,255 / 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
- 27 Oct 2019Three personal bests in one day at Lanzhou Autumn 2019.
- 11 May 2019Four personal bests in one day at Lanzhou Spring 2019.
- 22 Apr 2018Three personal bests in one day at Lanzhou Open 2018.
- 22 Apr 2017Three personal bests in one day at Lanzhou Spring 2017.
- 18 Feb 2014Three personal bests in one day at LanZhou Winter 2014.
- 16 Feb 2014Four personal bests in one day at Xining Winter Open 2014.
Competitions
- Lanzhou Autumn 2019 · 27 Oct 2019 — 3 personal bests set
- Lanzhou Spring 2019 · 11 May 2019 — 4 personal bests set
- Lanzhou Autumn 2018 · 14 Oct 2018 — 1 personal best set
- Lanzhou Open 2018 · 22 Apr 2018 — 3 personal bests set
- Xi'an New Year 2018 · 1 Jan 2018
- Ningxia Open 2017 · 13 Aug 2017 — 2 personal bests set
- Lanzhou Spring 2017 · 22 Apr 2017 — 3 personal bests set
- Xining Summer Open 2016 · 31 Jul 2016 — 2 personal bests set
- LanZhou Winter 2014 · 18 Feb 2014 — 3 personal bests set
- Xining Winter Open 2014 · 16 Feb 2014 — 4 personal bests set
- TUT 2013 · 17 Nov 2013 — 1 personal best set
- Tianjin Winter 2012 · 23 Dec 2012 — 2 personal bests set
- Tianjin Open 2011 · 25 Dec 2011
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.
- Baoquan Zhang (张宝权) — met in 59 rounds, finished ahead 31 times · head to head
- Baiqiang Dong (董百强) — met in 40 rounds, finished ahead 12 times
- Yunhui Shi (石蕴辉) — met in 38 rounds, finished ahead 16 times
Next targets
- A sub-2 2×2 single — 8,848 people have one; it is 0.02 away.
- A sub-10 3×3 single — 21,172 people have one; it is 0.41 away.
Targets move as he improves.