People · Chinese Taipei
Jia-Chuan Chang (張家銓)
3×3 · top 3.6% of 284,439 all-time · competing since August 2012 · 2012CHAN10
Jia-Chuan Chang (張家銓) has been competing for 14 years. His best event is the 3×3: a personal-best single of 8.44, set at Kaohsiung Open 2016, puts him in the top 3.6% of the 284,439 people who have ever been ranked in the event, and 209th in Chinese Taipei. Until July 2008, no official 3×3 solve in the world had been that fast. Across 21 competitions since August 2012, he has put 522 official solves on the record across six events. Solve to solve, his 3×3 times vary about 11% around a typical one, steadier than 93% of the 35,811 competitors with ten or more counted rounds. His 3×3 best has come down from 15.82 in August 2012 to 8.44, a 47% improvement. He has entered 21 competitions, more competitions than 97% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | Chinese Taipei | |
|---|---|---|---|---|---|
| 3×3 | 8.44 | 11.05 | top 3.6% | 209 / 4,213 | |
| 2×2 | 2.62 | 4.62 | top 10.1% | 280 / 1,669 | |
| 4×4 | 43.40 | 52.54 | top 16.3% | 359 / 1,078 | |
| 5×5 | 1:21.33 | 1:31.30 | top 20.1% | 250 / 639 | |
| 7×7 | 5:00.18 | 5:21.23 | top 50.6% | 169 / 252 | |
| 6×6 | 3:23.62 | 3:47.86 | top 52.1% | 211 / 292 |
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
- 25 Sep 2016First sub-10 3×3: 8.44 at Kaohsiung Open 2016.
- 7 Mar 2015Three personal bests in one day at All is Well 2015.
- 22 Feb 2014Three personal bests in one day at Kaohsiung Winter Open 2014.
- 3 Mar 2013First sub-15 3×3: 13.34 at Taiwan Winter Open 2013.
- 25 Aug 2012First competition: Taiwan Summer Open 2012. A 15.82 3×3 single to start from.
Competitions
- Maru Cube Day Taiwan 2025 · 2 Aug 2025
- WCA Asian Championship 2018 · 17 Aug 2018
- Taiwan Championship 2016 · 29 Oct 2016 — 1 personal best set
- Kaohsiung Open 2016 · 25 Sep 2016 — 1 personal best set
- Big Cubes Challenge 2016 · 27 Feb 2016 — 2 personal bests set
- Hsinchu Winter Open 2016 · 31 Jan 2016
- Taiwan Cubing League - Taichung 2015 · 25 Oct 2015
- China Championship 2015 · 2 Oct 2015 — 1 personal best set
- Cross-strait Cubing Exchange 2015 · 15 Aug 2015 — 2 personal bests set
- Hsinchu Summer Open 2015 · 26 Jul 2015
- Taiwan Cubing League - Taipei 2015 · 13 Jun 2015 — 1 personal best set
- Hsinchu Spring Open 2015 · 31 May 2015
- Maru Cube for Kids Day 2015 · 5 Apr 2015 — 2 personal bests set
- All is Well 2015 · 7 Mar 2015 — 3 personal bests set
- Kaohsiung Winter Open 2015 · 15 Feb 2015 — 2 personal bests set
- Hsinchu Winter Open 2014 · 14 Dec 2014 — 2 personal bests set
- Master Challenge 2014 · 28 Sep 2014 — 2 personal bests set
- Kaohsiung Winter Open 2014 · 22 Feb 2014 — 3 personal bests set
- MARU Cube for kid Day 2013 · 30 Mar 2013
- Taiwan Winter Open 2013 · 3 Mar 2013 — 2 personal bests set
- Taiwan Summer Open 2012 · 25 Aug 2012
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.
- Yi-Fan Wu (吳亦凡) — met in 99 rounds, never finished ahead
- Chia-Leo Lin (林珈樂) — met in 90 rounds, finished ahead 28 times
- Chao-Che Chung (鍾肇哲) — met in 87 rounds, finished ahead 20 times
Next targets
- A sub-8 3×3 single — 7,931 people have one; it is 0.44 away.
- A sub-2 2×2 single — 8,848 people have one; it is 0.62 away.
Targets move as he improves.