People · China
Jiazheng Zhao (赵家正)
3×3 one-handed · top 2.7% of 74,621 all-time · competing since July 2014 · 2014ZHAO10
Jiazheng Zhao (赵家正) has been competing for 12 years. His best event is the 3×3 one-handed: a personal-best single of 11.73, set at Bay Area Speedcubin' 12 2018, puts him in the top 2.7% of the 74,621 people who have ever been ranked in the event, and 233rd in China. Until August 2010, no official 3×3 one-handed solve in the world had been that fast. Across 45 competitions since July 2014, he has put 1,573 official solves on the record across 15 events. Solve to solve, his 3×3 times vary about 13% around a typical one, steadier than 54% of the 36,406 competitors with ten or more counted rounds. His 3×3 best has come down from 19.97 in July 2014 to 9.20, a 54% improvement. Jiazheng has entered 45 competitions, more competitions than 99% 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 one-handed | 11.73 | 15.27 | top 2.7% | 233 / 5,994 | |
| Pyraminx | 3.43 | 6.53 | top 5.2% | 633 / 10,269 | |
| 3×3 | 9.20 | 11.25 | top 5.4% | 2,107 / 28,499 | |
| 2×2 | 2.38 | 4.07 | top 7.8% | 1,141 / 15,939 | |
| Megaminx | 56.22 | 1:04.36 | top 8.1% | 199 / 1,693 | |
| 4×4 | 37.29 | 41.90 | top 9.1% | 970 / 5,999 | |
| Skewb | 4.22 | 6.48 | top 12.5% | 760 / 5,030 | |
| 3×3 Multi-Blind | 10 of 11 cubes · 48:32 | — | top 19.1% | 52 / 279 | |
| 3×3 Fewest Moves | 32 moves | 37.67 | top 20.4% | 218 / 1,071 | |
| 3×3 blindfolded | 1:22.87 | 1:40.26 | top 20.6% | 286 / 1,184 | |
| 5×5 | 1:27.67 | 1:36.94 | top 25.5% | 1,214 / 2,857 | |
| Square-1 | 20.79 | 25.18 | top 29.8% | 514 / 1,373 | |
| Clock | 12.88 | 14.84 | top 39.1% | 958 / 1,887 | |
| 7×7 | 5:04.69 | 5:30.51 | top 52.0% | 923 / 1,274 | |
| 6×6 | 3:32.22 | 3:57.17 | top 55.7% | 1,042 / 1,363 |
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
- 8 Sep 2019Three personal bests in one day at SacCubing VIII 2019.
- 22 Jun 2019Four personal bests in one day at CubingUSA Western Championship 2019.
- 1 Dec 2018Four personal bests in one day at Please Be Quiet Berkeley 2018.
- 21 Oct 2018Four personal bests in one day at Bay Area Speedcubin' 12 2018.
- 15 Sep 2018Four personal bests in one day at Berkeley Summer 2018.
- 27 Jul 2018Four personal bests in one day at CubingUSA Nationals 2018.
Competitions
- Bay Area Speedcubin' 30 2022 · 17 Apr 2022
- SacCubing X 2021 · 13 Nov 2021
- Bay Area Speedcubin' 24 2020 · 15 Feb 2020 — 1 personal best set
- SacCubing IX 2020 · 25 Jan 2020 — 2 personal bests set
- Bay Area Speedcubin' 22 2019 · 21 Dec 2019
- Bay Area Speedcubin' 21 2019 · 1 Dec 2019
- Bay Area Speedcubin' 20 2019 · 12 Oct 2019 — 1 personal best set
- Berkeley Summer 2019 · 21 Sep 2019 — 1 personal best set
- SacCubing VIII 2019 · 8 Sep 2019 — 3 personal bests set
- CubingUSA Western Championship 2019 · 22 Jun 2019 — 4 personal bests set
- Bay Area Speedcubin' 17 2019 · 1 Jun 2019 — 1 personal best set
- Berkeley Spring 2019 · 21 Apr 2019 — 1 personal best set
- Bay Area Speedcubin' 14 2019 · 16 Feb 2019 — 1 personal best set
- SJTU Winter Open 2018 · 30 Dec 2018 — 2 personal bests set
- Please Be Quiet Berkeley 2018 · 1 Dec 2018 — 4 personal bests set
- Berkeley Fall 2018 · 17 Nov 2018 — 2 personal bests set
- Bay Area Speedcubin' 12 2018 · 21 Oct 2018 — 4 personal bests set
- Berkeley Summer 2018 · 15 Sep 2018 — 4 personal bests set
- SacCubing V 2018 · 25 Aug 2018 — 1 personal best set
- CubingUSA Nationals 2018 · 27 Jul 2018 — 4 personal bests set
- Colorado Qualifier 2018 · 26 May 2018 — 1 personal best set
- Berkeley Spring 2018 · 7 Apr 2018 — 2 personal bests set
- Berkeley Winter 2018 · 24 Feb 2018
- Berkeley Fall 2017 · 18 Nov 2017 — 1 personal best set
- San Francisco Bay Open 2017 · 8 Oct 2017
- Berkeley Summer 2017 · 16 Sep 2017 — 3 personal bests set
- SacCubing II 2017 · 26 Aug 2017 — 1 personal best set
- Northwest Championships 2017 · 11 Aug 2017 — 3 personal bests set
- San Ramon 2017 · 15 Jul 2017
- 6.25 Bay Area 2017 · 24 Jun 2017 — 4 personal bests set
- Berkeley Spring 2017 · 15 Apr 2017 — 2 personal bests set
- Berkeley Winter 2017 · 11 Feb 2017 — 1 personal best set
- Please Be Quiet Berkeley 2017 · 4 Feb 2017 — 1 personal best set
- Armin Open 2017 · 21 Jan 2017 — 1 personal best set
- Berkeley Fall 2016 · 19 Nov 2016
- Berkeley Summer 2016 · 17 Sep 2016
- Hefei Open 2016 · 15 Jul 2016 — 4 personal bests set
- Shanghai Songjiang Open 2016 · 14 May 2016 — 2 personal bests set
- Xi'an Cherry Blossom 2016 · 2 Apr 2016 — 2 personal bests set
- Shanghai Spring 2016 · 19 Mar 2016 — 3 personal bests set
- Zhenjiang Open 2015 · 7 Nov 2015 — 4 personal bests set
- Wuxi Open 2015 · 8 Aug 2015 — 4 personal bests set
- Nanchang Open 2015 · 14 Jun 2015 — 5 personal bests set
- Hangzhou Winter Open 2014 · 29 Nov 2014 — 1 personal best set
- Suzhou Open 2014 · 12 Jul 2014
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.
- Riley Woo — met in 193 rounds, finished ahead 29 times
- Paul Mahvi — met in 190 rounds, finished ahead 30 times
- Abhimanyu Singhal — met in 187 rounds, finished ahead 150 times
Next targets
- A sub-10 3×3 one-handed single — 800 people have one; it is 1.73 away.
- A sub-3 Pyraminx single — 4,783 people have one; it is 0.43 away.
Targets move as he improves.