People · China
Justin Chang
3×3 · top 7.8% of 284,439 all-time · competing since April 2018 · 2018CHAN28
Justin Chang has been competing for 8 years. His best event is the 3×3: a personal-best single of 10.12, set at Melbourne Summer 2021, puts him in the top 7.8% of the 284,439 people who have ever been ranked in the event, and 3,051st in China. Until May 2007, no official 3×3 solve in the world had been that fast. Across 15 competitions since April 2018, he has put 414 official solves on the record across eight events. Solve to solve, his 3×3 times vary about 10% around a typical one, steadier than 97% of the 35,811 competitors with ten or more counted rounds. His 3×3 best has come down from 24.16 in April 2018 to 10.12, a 58% improvement. Justin has entered 15 competitions, more competitions than 95% 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 | 10.12 | 12.70 | top 7.8% | 3,051 / 28,153 | |
| 2×2 | 2.84 | 4.65 | top 12.4% | 1,941 / 15,796 | |
| Pyraminx | 4.91 | 6.64 | top 12.6% | 1,511 / 10,224 | |
| 4×4 | 41.76 | 47.64 | top 14.2% | 1,534 / 5,926 | |
| 3×3 one-handed | 21.38 | 26.63 | top 24.2% | 2,399 / 5,922 | |
| 5×5 | 1:56.59 | 2:13.06 | top 47.1% | 2,017 / 2,816 | |
| Skewb | 9.01 | 13.20 | top 48.5% | 2,767 / 5,004 | |
| Megaminx | 2:10.19 | 2:29.78 | top 51.3% | 1,334 / 1,678 |
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
- 18 May 2019Three personal bests in one day at Koalafication Melbourne 2019.
- 26 Jan 2019Six personal bests in one day at Melbourne Summer 2019.
- 6 Oct 2018First sub-20 3×3: 12.89 at Australian Nationals 2018.
- 6 Oct 2018First sub-15 3×3: 12.89 at Australian Nationals 2018.
- 30 Apr 2018First competition: Beijing Open 2018. A 24.16 3×3 single to start from.
Competitions
- Rubik's WCA Oceanic Championship 2022 · 15 Dec 2022
- Wonderful Williamstown 2022 · 23 Apr 2022
- Melbourne Mini Saturday 2022 · 5 Mar 2022
- Altona Algorithms Attempt 2 2021 · 17 Apr 2021
- Melbourne Summer 2021 · 23 Jan 2021 — 2 personal bests set
- Melbourne Cube Days 2019 · 30 Nov 2019 — 2 personal bests set
- Altona Algorithms 2019 · 5 Oct 2019 — 1 personal best set
- WCA World Championship 2019 · 11 Jul 2019 — 2 personal bests set
- Koalafication Melbourne 2019 · 18 May 2019 — 3 personal bests set
- Cube for Cambodia 2019 · 28 Apr 2019 — 2 personal bests set
- Melbourne Summer 2019 · 26 Jan 2019 — 6 personal bests set
- Melbourne Cube Days 2018 · 8 Dec 2018 — 2 personal bests set
- St Kevin's College Spring 2018 · 27 Oct 2018 — 1 personal best set
- Australian Nationals 2018 · 6 Oct 2018 — 1 personal best set
- Beijing Open 2018 · 30 Apr 2018
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.
- David Epstein — met in 85 rounds, never finished ahead
- Riley Dexter — met in 83 rounds, finished ahead once
- Ethan Pride — met in 81 rounds, finished ahead 37 times
Next targets
- A sub-10 3×3 single — 21,172 people have one; it is 0.12 away.
- A sub-2 2×2 single — 8,848 people have one; it is 0.84 away.
Targets move as he improves.