Sunday 6 September 2026 Rebuilt nightly from the WCA's official results · export of 6 September 2026 · About
The Middle Three
People → China → David-Nuo Cheng

People · China

David-Nuo Cheng

3×3 · top 3.2% of 284,439 all-time · competing since December 2023 · 2023CHED05

David-Nuo Cheng has been competing for 3 years. His best event is the 3×3: a personal-best single of 8.21, set at Waterloo Spring 2026, puts him in the top 3.2% of the 284,439 people who have ever been ranked in the event, and 1,166th in China. Until July 2008, no official 3×3 solve in the world had been that fast. Across 32 competitions since December 2023, he has put 591 official solves on the record across nine events. Solve to solve, his 3×3 times vary about 12% around a typical one, steadier than 80% of the 35,811 competitors with ten or more counted rounds. His 3×3 best has come down from 19.78 in December 2023 to 8.21, a 58% improvement. He has entered 32 competitions, more competitions than 98% of everyone who has ever competed.

3×3
best event — top 3.2% of 284,439 all-time
8.21
signature single · Waterloo Spring 2026
591
official solves on the record
12%
solve-to-solve spread · steadier than 80% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingChina
3×38.219.16
top 3.2%1,166 / 28,153
3×3 Fewest Moves31 moves—
top 17.4%183 / 1,058
2×23.385.17
top 18.7%3,056 / 15,796
3×3 one-handed19.8423.95
top 20.1%2,005 / 5,922
Pyraminx7.069.68
top 28.4%3,168 / 10,224
Clock13.9517.55
top 43.6%1,031 / 1,843
4×41:12.621:17.95
top 49.4%4,476 / 5,926
Skewb11.4014.45
top 63.0%3,421 / 5,004
Megaminx4:57.11—
early days — 2 solves1,671 / 1,678

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

Waterloo Favourites Autumn 2023: 19.78Greater Toronto 2024: 14.80Ajax 3x3x3 Newcomers C 2024: 14.11Thornhill Spring 2024: 13.29Battle of Waterloo 2024: 12.87NA Stadium Series - Edmonton 2024: 11.45Ontario Championship 2024: 12.13Pickering Mini Afternoon 2024: 11.24Championnat Québécois 2024: 11.05Kitchener Mini Afternoon 2024: 11.33Wrap It Up Barrie 2024: 10.03Waterloo Winter 2025: 10.76Greater Toronto 2025: 11.35Mississauga Newcomers B 2025: 10.76Western Ontario Winter 2025: 10.01Pickering Favourites Spring 2025: 10.08Rubik's WCA World Championship 2025: 10.90Championnat Canadien 2025: 10.22Brantford Fall 2025: 9.51Pickering Favourites Fall 2025: 8.80Waterloo Fall 2025: 8.56Pickering NxNxN Winter 2026: 9.19Open de Gatineau 2026: 8.92Western Ontario Winter 2026: 8.39Pickering Mini Morning 2026: 9.29Wasaga Beach Spring 2026: 9.00Waterloo Spring 2026: 8.21Canadian Prairie Championship 2026: 9.04Brampton Summer 2026: 8.718.2119.7816 Dec 202329 Aug 2026

Best single per competition, 3×3. Faster is higher — the axis is the right way up.

The story so far

Competitions

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.

Next targets

  • A sub-8 3×3 single — 7,931 people have one; it is 0.21 away.
  • A sub-3 2×2 single — 26,570 people have one; it is 0.38 away.

Targets move as he improves.