People · Hong Kong, China
Tai Ho Sum (戴皓琛)
3×3 · top 0.65% of 288,433 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 6.24, set at Hong Kong Cube Day 2026, puts him in the top 0.65% of the 288,433 people who have ever been ranked in the event, and 16th in Hong Kong, China. Until May 2011, no official 3×3 solve in the world had been that fast. Across 6 competitions since August 2024, he has put 154 official solves on the record across six events. Solve to solve, his 3×3 times vary about 12% around a typical one, steadier than 62% of the 36,406 competitors with ten or more counted rounds. His 3×3 best has come down from 11.06 in August 2024 to 6.24, a 44% improvement. Tai has entered six competitions, more competitions than 86% 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 | 6.24 | 8.43 | top 0.65% | 16 / 1,424 | |
| 4×4 | 31.14 | 33.73 | top 3.6% | 38 / 447 | |
| 2×2 | 1.96 | 3.19 | top 4.5% | 64 / 880 | |
| 3×3 one-handed | 14.49 | 16.10 | top 7.1% | 42 / 384 | |
| Pyraminx | 5.86 | 8.11 | top 19.0% | 119 / 448 | |
| Skewb | 7.63 | 13.61 | top 38.6% | 156 / 293 |
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
- 12 Sep 2026Three personal bests in one day at Hong Kong Cube Day 2026.
- 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
- Hong Kong Autumn Cube Day 2026 · 17 Oct 2026
- Hong Kong Cube Day 2026 · 12 Sep 2026 — 3 personal bests set
- 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.
- Timothy Kong Wing Sum (江永琛) — met in 30 rounds, finished ahead 3 times
- Andy Mok Man Cheuk (莫文卓) — met in 29 rounds, finished ahead once
- Rinji Chan Pak Hei (陳柏熹) — met in 28 rounds, finished ahead 9 times
Next targets
- A sub-6 3×3 single — 1,419 people have one; it is 0.24 away.
- A sub-30 4×4 single — 2,465 people have one; it is 1.14 away.
Targets move as he improves.