People · Chinese Taipei
Zhi-Chen Cai (蔡智丞)
3×3 · top 7.7% of 284,439 all-time · competing since May 2021 · 2021CAIZ03
Zhi-Chen Cai (蔡智丞) has been competing for 5 years. His best event is the 3×3: a personal-best single of 10.07, set at Maru Cube Day Taiwan 2025, puts him in the top 7.7% of the 284,439 people who have ever been ranked in the event, and 452nd in Chinese Taipei. Until May 2007, no official 3×3 solve in the world had been that fast. Across 11 competitions since May 2021, he has put 179 official solves on the record across eleven events. Solve to solve, his 3×3 times vary about 13% around a typical one, steadier than 51% of the 35,811 competitors with ten or more counted rounds. His 3×3 best has come down from 13.05 in May 2021 to 10.07, a 23% improvement. He has entered eleven competitions, more competitions than 93% 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 | 10.07 | 11.41 | top 7.7% | 452 / 4,213 | |
| 2×2 | 3.47 | 4.74 | top 19.8% | 500 / 1,669 | |
| 3×3 one-handed | 20.41 | 23.16 | top 21.6% | 276 / 802 | |
| 4×4 | 50.75 | 1:00.49 | top 25.7% | 494 / 1,078 | |
| 5×5 | 1:34.98 | — | top 31.5% | 342 / 639 | |
| Pyraminx | 8.42 | 11.56 | top 39.9% | 531 / 1,016 | |
| Skewb | 8.75 | 15.52 | top 46.7% | 424 / 699 | |
| Square-1 | 29.07 | — | top 47.7% | 191 / 323 | |
| 6×6 | 3:19.27 | — | early days — 2 solves | 207 / 292 | |
| Megaminx | 2:29.23 | — | early days — 2 solves | 276 / 362 | |
| 7×7 | 8:29.09 | — | early days — 1 solve | 243 / 252 |
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
- 3 Aug 2024Three personal bests in one day at Maru Cube Day Taiwan 2024.
- 27 Jan 2024Five personal bests in one day at Kaohsiung Winter Open 2024.
- 8 Dec 2023Four personal bests in one day at Taiwan Championship 2023.
- 9 May 2021First competition: Welcome Back Kaohsiung 2021. A 13.05 3×3 single to start from.
Competitions
- Shin Kong Cube Open - Taitung 2025 · 28 Dec 2025
- Taiwan Championship 2025 · 19 Dec 2025
- Maru Cube Day Taiwan 2025 · 2 Aug 2025 — 1 personal best set
- Taiwan Championship 2024 · 6 Dec 2024 — 1 personal best set
- Maru Cube Day Taiwan 2024 · 3 Aug 2024 — 3 personal bests set
- Kaohsiung Winter Open 2024 · 27 Jan 2024 — 5 personal bests set
- Taiwan Championship 2023 · 8 Dec 2023 — 4 personal bests set
- Taiwan Cubing Challenge 2023 · 18 Jun 2023 — 2 personal bests set
- NDHU Big Cube Day 2023 · 20 May 2023
- Maru Cube Day 2021 · 11 Dec 2021
- Welcome Back Kaohsiung 2021 · 9 May 2021
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.
- Chao-Che Chung (鍾肇哲) — met in 41 rounds, never finished ahead
- Chun-Pao Ni (倪君寶) — met in 39 rounds, finished ahead once
- Chia-Leo Lin (林珈樂) — met in 38 rounds, finished ahead 14 times
Next targets
- A sub-10 3×3 single — 21,172 people have one; it is 0.07 away.
- A sub-3 2×2 single — 26,570 people have one; it is 0.47 away.
Targets move as he improves.