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People → Chinese Taipei → Tsung-Kai Chang (張宗楷)

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.

5×5
best event — top 8.9% of 40,792 all-time
1:05.86
signature single · New Taipei Big Cube Day 2024
159
official solves on the record
10%
solve-to-solve spread · steadier than 97% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingChinese Taipei
5×51:05.861:14.18
top 8.9%143 / 639
4×438.2740.80
top 10.1%234 / 1,078
3×311.0112.77
top 10.5%629 / 4,213
6×62:14.922:20.88
top 17.9%107 / 292
2×23.575.12
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

Taiwan Summer Open 2013: 20.89Hsinchu Winter Open 2013: 19.43Taoyuan Airport Cube Day 2023: 12.00Chien Kuo Cubing Party 2024: 11.80Hsinchu Summer Open 2024: 13.38Taoyuan Airport Cube Day 2024: 11.68Zhongshan Open 2025: 14.56Taipei Summer Open 2025: 11.0111.0120.8917 Aug 201328 Jun 2025

Best single per competition, 3×3. Faster is higher — the axis is the right way up.

The story so far

Competitions

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.

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.