People · Hong Kong, China
Aristo Ku (顧清弦)
3×3 blindfolded · top 1.7% of 12,334 all-time · competing since September 2018 · 2018YINK02
Aristo Ku (顧清弦) has been competing for 8 years. His best event is the 3×3 blindfolded: a personal-best single of 21.01, set at Adelaide Spring 2026, puts him in the top 1.7% of the 12,334 people who have ever been ranked in the event, and 3rd in Hong Kong, China. Until November 2016, no official 3×3 blindfolded solve in the world had been that fast. Across 9 competitions since September 2018, he has put 136 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 11.77 in September 2018 to 8.74, a 26% improvement. Aristo has entered nine competitions, more competitions than 91% 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 blindfolded | 21.01 | — | top 1.7% | 3 / 67 | |
| 3×3 | 8.74 | 9.95 | top 4.3% | 133 / 1,424 | |
| 5×5 | 1:05.20 | 1:08.32 | top 8.6% | 41 / 196 | |
| 4×4 | 42.75 | 43.77 | top 15.5% | 125 / 447 | |
| 2×2 | 3.71 | 5.02 | top 22.9% | 279 / 880 | |
| Pyraminx | 12.06 | 18.05 | top 67.6% | 357 / 448 |
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
- 10 Jan 2026Four personal bests in one day at Adelaide Summer 2026.
- 19 Jul 2025First sub-10 3×3: 9.78 at SA State Championship 2025.
- 19 Jul 2025Three personal bests in one day at SA State Championship 2025.
- 28 Jan 2023Three personal bests in one day at Adelaide Summer 2023.
- 22 Sep 2018First competition: Dongguan Mid-Autumn Festival 2018. A 11.77 3×3 single to start from.
Competitions
- Adelaide Spring 2026 · 3 Oct 2026 — 1 personal best set
- Take Your Time Sydney 2026 · 12 Sep 2026 — 1 personal best set
- North Sydney No Seeing 2026 · 18 Apr 2026 — 1 personal best set
- Adelaide Summer 2026 · 10 Jan 2026 — 4 personal bests set
- Cammeray Clock Clash 2025 · 27 Sep 2025 — 1 personal best set
- SA State Championship 2025 · 19 Jul 2025 — 3 personal bests set
- Adelaide Summer 2023 · 28 Jan 2023 — 3 personal bests set
- Zhongshan Children's Cube Day 2019 · 1 Jun 2019
- Dongguan Mid-Autumn Festival 2018 · 22 Sep 2018
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.
- Adrian Oon — met in 18 rounds, finished ahead 5 times
- Jonah Blakeley — met in 18 rounds, finished ahead 3 times
- Dallas McNeil — met in 17 rounds, finished ahead 12 times
Next targets
- A sub-20 3×3 blindfolded single — 176 people have one; it is 1.01 away.
- A sub-8 3×3 single — 8,101 people have one; it is 0.74 away.
Targets move as he improves.