People · United States
Alexander Hao-Jia Du
2×2 · top 9.2% of 189,179 all-time · competing since October 2025 · 2025DUAL01
Alexander Hao-Jia Du has been competing for a year. His best event is the 2×2: a personal-best single of 2.52, set at Berkeley Spring 2026, puts him in the top 9.2% of the 189,179 people who have ever been ranked in the event, and 3,653rd in the United States. Until February 2008, no official 2×2 solve in the world had been that fast. Across 13 competitions since October 2025, he has put 157 official solves on the record across six events. Solve to solve, his 3×3 times vary about 16% around a typical one; 92% of the 36,406 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 15.80 in October 2025 to 11.76, a 26% improvement. Alexander has entered 13 competitions, more competitions than 94% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | United States | |
|---|---|---|---|---|---|
| 2×2 | 2.52 | 5.23 | top 9.2% | 3,653 / 41,674 | |
| 3×3 | 11.76 | 15.40 | top 13.1% | 7,123 / 60,666 | |
| 3×3 one-handed | 17.96 | 23.32 | top 15.0% | 1,973 / 15,900 | |
| 5×5 | 1:44.75 | 1:55.61 | top 39.0% | 3,175 / 9,537 | |
| 4×4 | 1:30.84 | — | early days — 2 solves | 11,440 / 19,354 | |
| Megaminx | 3:28.51 | — | early days — 3 solves | 6,779 / 8,026 |
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
- 14 Nov 2025First sub-15 3×3: 14.97 at Berkeley November Weekday 2025.
- 4 Oct 2025First competition: Berkeley Fall 2025. A 15.80 3×3 single to start from.
Competitions
- Berkeley Fall 2026 · 11 Oct 2026
- Berkeley May Weekday 2026 · 1 May 2026
- Berkeley Spring 2026 · 26 Apr 2026 — 1 personal best set
- Berkeley Pre-Cal Day 2026 · 17 Apr 2026
- Berkeley March Weekday 2026 · 13 Mar 2026 — 1 personal best set
- Berkeley Favorites 2026 · 1 Mar 2026 — 1 personal best set
- Berkeley February Weekday 2026 · 6 Feb 2026
- Berkeley January Weekday 2026 · 22 Jan 2026 — 1 personal best set
- Berkeley December Weekday 2025 · 2 Dec 2025 — 1 personal best set
- Berkeley November Weekday 2025 · 14 Nov 2025 — 2 personal bests set
- Cool Down Berkeley 2025 · 2 Nov 2025 — 1 personal best set
- Berkeley October Weekday 2025 · 24 Oct 2025
- Berkeley Fall 2025 · 4 Oct 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.
- Bowen Deng (邓博文) — met in 34 rounds, finished ahead twice
- James Chea — met in 33 rounds, finished ahead twice
- Ethan Jan — met in 33 rounds, never finished ahead
Next targets
- A sub-2 2×2 single — 9,039 people have one; it is 0.52 away.
- A sub-10 3×3 single — 21,606 people have one; it is 1.76 away.
Targets move as he improves.