People · Chinese Taipei
Tsung-Kai Chang (張宗楷)
5×5 · top 8.9% of 40,792 all-time · competing since August 2013 · 2013CHAN08
Tsung-Kai Chang (張宗楷) has been competing for 13 years. His best event is the 5×5: a personal-best single of 1:05.86, set at New Taipei Big Cube Day 2024, puts him in the top 8.9% of the 40,792 people who have ever been ranked in the event, and 143rd in Chinese Taipei. Until August 2010, no official 5×5 solve in the world had been that fast. Across 9 competitions since August 2013, he has put 159 official solves on the record across five 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 20.89 in August 2013 to 11.01, a 47% improvement. He has entered nine competitions, more competitions than 91% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | Chinese Taipei | |
|---|---|---|---|---|---|
| 5×5 | 1:05.86 | 1:14.18 | top 8.9% | 143 / 639 | |
| 4×4 | 38.27 | 40.80 | top 10.1% | 234 / 1,078 | |
| 3×3 | 11.01 | 12.77 | top 10.5% | 629 / 4,213 | |
| 6×6 | 2:14.92 | 2:20.88 | top 17.9% | 107 / 292 | |
| 2×2 | 3.57 | 5.12 | top 21.1% | 522 / 1,669 |
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 May 2024Four personal bests in one day at Chien Kuo Cubing Party 2024.
- 11 Nov 2023First sub-15 3×3: 12.14 at Taoyuan Airport Cube Day 2023.
- 11 Nov 2023Five personal bests in one day at Taoyuan Airport Cube Day 2023.
- 29 Dec 2013First sub-20 3×3: 19.43 at Hsinchu Winter Open 2013.
- 29 Dec 2013Three personal bests in one day at Hsinchu Winter Open 2013.
- 17 Aug 2013First competition: Taiwan Summer Open 2013. A 20.89 3×3 single to start from.
Competitions
- Taipei Summer Open 2025 · 28 Jun 2025 — 1 personal best set
- Zhongshan Open 2025 · 3 May 2025
- Taoyuan Airport Cube Day 2024 · 23 Nov 2024 — 1 personal best set
- New Taipei Big Cube Day 2024 · 18 Aug 2024 — 1 personal best set
- Hsinchu Summer Open 2024 · 17 Aug 2024
- Chien Kuo Cubing Party 2024 · 25 May 2024 — 4 personal bests set
- Taoyuan Airport Cube Day 2023 · 11 Nov 2023 — 5 personal bests set
- Hsinchu Winter Open 2013 · 29 Dec 2013 — 3 personal bests set
- Taiwan Summer Open 2013 · 17 Aug 2013
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.
- Chia-Leo Lin (林珈樂) — met in 30 rounds, finished ahead 20 times
- Chao-Che Chung (鍾肇哲) — met in 30 rounds, finished ahead 3 times
- Yi-Fan Wu (吳亦凡) — met in 30 rounds, never finished ahead
Next targets
- A sub-1:00 5×5 single — 2,252 people have one; it is 5.86 away.
- A sub-30 4×4 single — 2,388 people have one; it is 8.27 away.
Targets move as he improves.