People · Hong Kong, China
Choi Tsz Ki (蔡祉祈)
3×3 · top 17.6% of 284,439 all-time · competing since March 2023 · 2023KICH01
Choi Tsz Ki (蔡祉祈) has been competing for 4 years. Her best event is the 3×3: a personal-best single of 13.05, set at HKRCU 20th Anniversary 2025, puts her in the top 17.6% of the 284,439 people who have ever been ranked in the event, and 380th in Hong Kong, China. Across 4 competitions since March 2023, she has put 44 official solves on the record across three events. Her 3×3 best has come down from 25.12 in March 2023 to 13.05, a 48% improvement. Choi has entered four competitions, more competitions than 78% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | Hong Kong, China | |
|---|---|---|---|---|---|
| 3×3 | 13.05 | 15.96 | top 17.6% | 380 / 1,347 | |
| 2×2 | 4.64 | 5.95 | top 34.7% | 405 / 855 | |
| Pyraminx | 11.07 | 14.85 | top 61.0% | 316 / 431 |
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
- 20 Sep 2025First sub-20 3×3: 13.05 at HKRCU 20th Anniversary 2025.
- 20 Sep 2025First sub-15 3×3: 13.05 at HKRCU 20th Anniversary 2025.
- 4 Mar 2023First competition: Hong Kong Cube Day 2023. A 25.12 3×3 single to start from.
Competitions
- Hong Kong Championship 2025 · 15 Nov 2025 — 1 personal best set
- HKRCU 20th Anniversary 2025 · 20 Sep 2025 — 2 personal bests set
- Hong Kong Championship 2023 · 21 Oct 2023 — 1 personal best set
- Hong Kong Cube Day 2023 · 4 Mar 2023
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 her.
- Chan Pak Lam (陳柏霖) — met in 9 rounds, finished ahead twice
- Chan Sai Chong (陳世聰) — met in 9 rounds, finished ahead once
- Fung Hoi Yin (馮凱賢) — met in 9 rounds, never finished ahead
Next targets
- A sub-12 3×3 single — 39,535 people have one; it is 1.05 away.
- A sub-4 2×2 single — 49,452 people have one; it is 0.64 away.
Targets move as she improves.