People · Hong Kong, China
Sum Leung
3×3 · top 27.9% of 284,439 all-time · competing since April 2025 · 2025LEUN04
Sum Leung has been competing for a year. His best event is the 3×3: a personal-best single of 16.04, set at Stevenage September 2025, puts him in the top 27.9% of the 284,439 people who have ever been ranked in the event, and 572nd in Hong Kong, China. Across 4 competitions since April 2025, he has put 78 official solves on the record across seven events. Solve to solve, his 3×3 times vary about 19% around a typical one, an early reading from 5 counted rounds. His 3×3 best has come down from 26.49 in April 2025 to 16.04, a 39% improvement. Sum 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 | 16.04 | 18.57 | top 27.9% | 572 / 1,347 | |
| 2×2 | 5.41 | 7.88 | top 44.3% | 498 / 855 | |
| 3×3 one-handed | 40.24 | — | top 65.6% | 308 / 361 | |
| 4×4 | 1:38.49 | — | early days — 2 solves | 363 / 423 | |
| Pyraminx | 12.67 | 16.44 | top 71.1% | 354 / 431 | |
| Skewb | 19.27 | 23.07 | top 88.5% | 272 / 285 | |
| Square-1 | 1:17.05 | 1:36.14 | top 91.8% | 125 / 126 |
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
- 26 Jul 2025First sub-20 3×3: 17.64 at Wiltshire Summer 2025.
- 26 Jul 2025Three personal bests in one day at Wiltshire Summer 2025.
- 19 Apr 2025First competition: Stevenage April 2025. A 26.49 3×3 single to start from.
Competitions
- Stevenage September 2025 · 6 Sep 2025 — 1 personal best set
- Wiltshire Summer 2025 · 26 Jul 2025 — 3 personal bests set
- Stevenage June 2025 · 7 Jun 2025
- Stevenage April 2025 · 19 Apr 2025
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.
- Satya Bhavesh Gala — met in 22 rounds, never finished ahead
- Daniel Robinson — met in 20 rounds, finished ahead once
- Chris Bonnello — met in 16 rounds, never finished ahead
Next targets
- A sub-15 3×3 single — 69,493 people have one; it is 1.04 away.
- A sub-5 2×2 single — 73,413 people have one; it is 0.41 away.
Targets move as he improves.