People · Hong Kong, China
Tai Ho Sum (戴皓琛)
3×3 · top 2.5% of 284,439 all-time · competing since August 2024 · 2024SUMT01
Tai Ho Sum (戴皓琛) has been competing for 2 years. His best event is the 3×3: a personal-best single of 7.81, set at HKRCU 20th Anniversary 2025, puts him in the top 2.5% of the 284,439 people who have ever been ranked in the event, and 62nd in Hong Kong, China. Until July 2008, no official 3×3 solve in the world had been that fast. Across 4 competitions since August 2024, he has put 114 official solves on the record across six events. Solve to solve, his 3×3 times vary about 12% around a typical one, an early reading from 8 counted rounds. His 3×3 best has come down from 11.06 in August 2024 to 7.81, a 29% improvement. Tai 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 | 7.81 | 9.08 | top 2.5% | 62 / 1,347 | |
| 2×2 | 1.96 | 3.19 | top 4.5% | 60 / 855 | |
| 4×4 | 35.13 | 38.67 | top 6.8% | 56 / 423 | |
| 3×3 one-handed | 15.92 | 22.82 | top 10.0% | 62 / 361 | |
| Pyraminx | 5.86 | 8.11 | top 18.9% | 117 / 431 | |
| Skewb | 7.63 | 13.61 | top 38.5% | 149 / 285 |
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 2025Three personal bests in one day at HKRCU 20th Anniversary 2025.
- 16 Nov 2024First sub-10 3×3: 7.86 at Hong Kong Championship 2024.
- 16 Nov 2024Three personal bests in one day at Hong Kong Championship 2024.
- 31 Aug 2024First competition: Hong Kong Cube Day 2024. A 11.06 3×3 single to start from.
Competitions
- HKRCU 20th Anniversary 2025 · 20 Sep 2025 — 3 personal bests set
- Hong Kong Cube Day 2025 · 7 Jun 2025 — 1 personal best set
- Hong Kong Championship 2024 · 16 Nov 2024 — 3 personal bests set
- Hong Kong Cube Day 2024 · 31 Aug 2024
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.
- Andy Mok Man Cheuk (莫文卓) — met in 24 rounds, never finished ahead
- Nathan Lap Chun Ling (凌立晉) — met in 22 rounds, finished ahead 8 times
- Angus Wong Tsz On (王梓安) — met in 22 rounds, finished ahead 7 times
Next targets
- A sub-6 3×3 single — 1,376 people have one; it is 1.81 away.
- A sub-1 2×2 single — 1,032 people have one; it is 0.96 away.
Targets move as he improves.