People · Hong Kong, China
Yu Wai Sum (余瑋深)
3×3 · top 7.0% of 284,439 all-time · competing since January 2019 · 2019SUMY01
Yu Wai Sum (余瑋深) has been competing for 8 years. His best event is the 3×3: a personal-best single of 9.85, set at Shenzhen Cubing 10th Anniversary 2019, puts him in the top 7.0% of the 284,439 people who have ever been ranked in the event, and 175th in Hong Kong, China. Until October 2007, no official 3×3 solve in the world had been that fast. Across 2 competitions since January 2019, he has put 65 official solves on the record across five events. Solve to solve, his 3×3 times vary about 13% around a typical one, an early reading from 5 counted rounds. His 3×3 best has come down from 12.13 in January 2019 to 9.85, a 19% improvement. Yu has entered two competitions.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | Hong Kong, China | |
|---|---|---|---|---|---|
| 3×3 | 9.85 | 11.34 | top 7.0% | 175 / 1,347 | |
| 2×2 | 2.34 | 3.94 | top 7.4% | 99 / 855 | |
| 3×3 one-handed | 19.13 | 22.42 | top 18.2% | 113 / 361 | |
| 4×4 | 50.88 | 51.99 | top 25.8% | 172 / 423 | |
| Pyraminx | 7.18 | 8.35 | top 29.3% | 188 / 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
- 24 Aug 2019First sub-10 3×3: 9.85 at Shenzhen Cubing 10th Anniversary 2019.
- 24 Aug 2019Three personal bests in one day at Shenzhen Cubing 10th Anniversary 2019.
- 26 Jan 2019First competition: Hong Kong Cube Day 2019. A 12.13 3×3 single to start from.
Competitions
- Shenzhen Cubing 10th Anniversary 2019 · 24 Aug 2019 — 3 personal bests set
- Hong Kong Cube Day 2019 · 26 Jan 2019
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.
- Sungyi Lee — met in 13 rounds, finished ahead 5 times
- Wong Kin Lok (黃健樂) — met in 13 rounds, never finished ahead
- Wong Yuk Chi (黃昱誌) — met in 13 rounds, never finished ahead
Next targets
- A sub-8 3×3 single — 7,931 people have one; it is 1.85 away.
- A sub-2 2×2 single — 8,848 people have one; it is 0.34 away.
Targets move as he improves.