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People → Chinese Taipei → Kai-Lun Cheng (鄭凱倫)

People · Chinese Taipei

Kai-Lun Cheng (鄭凱倫)

4×4 · top 0.082% of 83,917 all-time · competing since December 2020 · 2020CHEN31

Kai-Lun Cheng (鄭凱倫) has been competing for 6 years. His best event is the 4×4: a personal-best single of 20.57, set at Taipei Summer Open 2025, puts him in the top 0.082% of the 83,917 people who have ever been ranked in the event, and 2nd in Chinese Taipei. Until June 2017, no official 4×4 solve in the world had been that fast. Across 34 competitions since December 2020, he has put 2,040 official solves on the record across 13 events. Solve to solve, his 3×3 times vary about 16% around a typical one; 91% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 7.42 in December 2020 to 5.60, a 25% improvement. He has entered 34 competitions, more competitions than 98% of everyone who has ever competed.

4×4
best event — top 0.082% of 83,917 all-time
20.57
signature single · Taipei Summer Open 2025
2,040
official solves on the record
16%
solve-to-solve spread · wider than 91% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingChinese Taipei
4×420.5726.03
top 0.082%2 / 1,078
Pyraminx1.203.08
top 0.15%4 / 1,016
5×541.6148.54
top 0.28%6 / 639
3×35.606.74
top 0.29%11 / 4,213
Skewb1.442.82
top 0.36%2 / 699
7×72:10.952:29.14
top 1.3%11 / 252
6×61:26.911:32.53
top 1.4%11 / 292
3×3 one-handed10.8912.54
top 1.7%22 / 802
2×21.412.60
top 1.8%41 / 1,669
Megaminx44.4947.84
top 2.9%19 / 362
Clock8.3710.58
top 16.9%71 / 366
3×3 Fewest Moves32 moves33.00
top 20.4%40 / 204
Square-142.88—
top 68.7%248 / 323

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 Championship 2020: 7.42Maru Cube Day 2021: 8.07Welcome Back Taipei 2021: 7.23Taiwan Open 2022: 8.78CK Cubing Party 2022: 6.92Chiayi Open 2022: 7.66Taoyuan Cubing Open 2022: 6.81Taichung Open 2023: 6.76Taiwan Cubing Challenge 2023: 6.85New Taipei Open 2023: 8.34Maru Cube Day 2023: 5.94Rubik's WCA World Championship 2023: 6.88Taoyuan Airport Cube Day 2023: 5.78Taiwan Championship 2023: 6.65Honhui Cubing Carnival 2024: 6.09Zhongshan Open 2024: 5.89Chien Kuo Cubing Party 2024: 6.40Taipei Summer Open 2024: 6.66Philippine Championship 2024: 5.63Maru Cube Day Taiwan 2024: 6.38Hsinchu Summer Open 2024: 6.04Shin Kong Cube Open - Taichung 2024: 6.67Shin Kong Cube Open - New Taipei 2024: 5.63Taoyuan Airport Cube Day 2024: 5.83Taiwan Championship 2024: 5.98Pingtung Winter Open 2025: 5.60BQHS Spring Open 2025: 5.75Zhongshan Open 2025: 6.39Chien Kuo Cubing Party 2025: 6.16Taipei Summer Open 2025: 5.81Maru Cube Day Taiwan 2026: 6.675.608.7818 Dec 202025 Jul 2026

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-20 4×4 single — 42 people have one; it is 0.57 away.
  • A sub-1 Pyraminx single — 49 people have one; it is 0.20 away.

Targets move as he improves.