People · Chinese Taipei
Zi-Kai Peng (彭資凱)
3×3 · top 2.2% of 284,439 all-time · competing since January 2022 · 2022PENG03
Zi-Kai Peng (彭資凱) has been competing for 5 years. His best event is the 3×3: a personal-best single of 7.64, set at Shin Kong Cube Open - Kaohsiung 2024, puts him in the top 2.2% of the 284,439 people who have ever been ranked in the event, and 127th in Chinese Taipei. Until July 2008, no official 3×3 solve in the world had been that fast. Across 8 competitions since January 2022, he has put 146 official solves on the record across four events. Solve to solve, his 3×3 times vary about 13% around a typical one; 57% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 13.76 in January 2022 to 7.64, a 44% improvement. He has entered eight competitions, more competitions than 90% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | Chinese Taipei | |
|---|---|---|---|---|---|
| 3×3 | 7.64 | 10.01 | top 2.2% | 127 / 4,213 | |
| 4×4 | 31.68 | 40.82 | top 3.9% | 103 / 1,078 | |
| 3×3 one-handed | 13.58 | 16.33 | top 5.4% | 68 / 802 | |
| 2×2 | 3.88 | 5.08 | top 24.9% | 604 / 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
- 22 Jul 2023Three personal bests in one day at Maru Cube Day 2023.
- 18 Jun 2023First sub-10 3×3: 9.60 at Taiwan Cubing Challenge 2023.
- 18 Jun 2023Three personal bests in one day at Taiwan Cubing Challenge 2023.
- 14 Jan 2022First competition: Taiwan Open 2022. A 13.76 3×3 single to start from.
Competitions
- Maru Cube Day Taiwan 2025 · 2 Aug 2025 — 1 personal best set
- Shin Kong Cube Open - Kaohsiung 2024 · 12 Oct 2024 — 1 personal best set
- Hsinchu Summer Open 2024 · 17 Aug 2024 — 2 personal bests set
- Shin Kong Cube Open 2023 · 16 Sep 2023 — 1 personal best set
- Rubik's WCA World Championship 2023 · 12 Aug 2023
- Maru Cube Day 2023 · 22 Jul 2023 — 3 personal bests set
- Taiwan Cubing Challenge 2023 · 18 Jun 2023 — 3 personal bests set
- Taiwan Open 2022 · 14 Jan 2022
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.
- Cian-Jyun Yang (楊謙君) — met in 30 rounds, never finished ahead
- Ruei-Hong Liang (梁睿紘) — met in 27 rounds, finished ahead 4 times
- Wei-Chen Hsieh (謝維宸) — met in 27 rounds, never finished ahead
Next targets
- A sub-6 3×3 single — 1,376 people have one; it is 1.64 away.
- A sub-30 4×4 single — 2,388 people have one; it is 1.68 away.
Targets move as he improves.