People · Netherlands
Jakka Chang
3×3 · top 3.0% of 284,439 all-time · competing since September 2014 · 2014CHAN17
Jakka Chang has been competing for 12 years. His best event is the 3×3: a personal-best single of 8.12, set at Rubik's Dutch Nationals 2025, puts him in the top 3.0% of the 284,439 people who have ever been ranked in the event, and 88th in the Netherlands. Until July 2008, no official 3×3 solve in the world had been that fast. Across 14 competitions since September 2014, he has put 332 official solves on the record across seven events. Solve to solve, his 3×3 times vary about 15% around a typical one; 82% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 20.05 in September 2014 to 8.12, a 60% improvement. Jakka has entered 14 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 | Netherlands | |
|---|---|---|---|---|---|
| 3×3 | 8.12 | 9.86 | top 3.0% | 88 / 2,294 | |
| 4×4 | 46.23 | 49.79 | top 19.8% | 183 / 1,000 | |
| 3×3 one-handed | 20.07 | 22.72 | top 20.7% | 128 / 726 | |
| 5×5 | 1:29.08 | 1:36.80 | top 26.5% | 132 / 532 | |
| 2×2 | 4.63 | 5.57 | top 34.6% | 769 / 1,665 | |
| Pyraminx | 8.58 | 11.75 | top 41.2% | 646 / 1,283 | |
| Square-1 | 44.94 | 1:17.95 | top 71.0% | 263 / 407 |
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
- 5 Sep 2025Three personal bests in one day at Rubik's Dutch Nationals 2025.
- 15 Nov 2024Three personal bests in one day at Dutch Nationals 2024.
- 3 Mar 2018First sub-10 3×3: 9.45 at Assen Open 2018.
- 1 Oct 2016Three personal bests in one day at Dutch Nationals 2016.
- 20 Mar 2016Three personal bests in one day at Tulip Open 2016.
- 27 Sep 2015First sub-20 3×3: 13.78 at Dutch Nationals 2015.
Competitions
- Rubik's Dutch Nationals 2025 · 5 Sep 2025 — 3 personal bests set
- Dutch Nationals 2024 · 15 Nov 2024 — 3 personal bests set
- Dutch Winter South 2024 · 13 Jan 2024
- Dutch Open 2023 · 3 Jun 2023 — 1 personal best set
- Capelle Cubing 2023 · 14 May 2023
- Assen Open 2018 · 3 Mar 2018 — 2 personal bests set
- Dutch Nationals 2017 · 23 Sep 2017 — 2 personal bests set
- Breda Open 2017 · 10 Jun 2017 — 2 personal bests set
- Zuidplas Open 2017 · 15 Apr 2017 — 2 personal bests set
- Dutch Nationals 2016 · 1 Oct 2016 — 3 personal bests set
- King's Open 2016 · 21 May 2016 — 2 personal bests set
- Tulip Open 2016 · 20 Mar 2016 — 3 personal bests set
- Dutch Nationals 2015 · 27 Sep 2015 — 2 personal bests set
- Dutch Nationals 2014 · 28 Sep 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.
- Daniël Kassab — met in 62 rounds, finished ahead 9 times
- Antonie Paterakis — met in 62 rounds, never finished ahead
- Ron van Bruchem — met in 60 rounds, finished ahead 36 times
Next targets
- A sub-8 3×3 single — 7,931 people have one; it is 0.12 away.
- A sub-40 4×4 single — 10,180 people have one; it is 6.23 away.
Targets move as he improves.