People · United States
John Ku
3×3 · top 7.6% of 284,439 all-time · competing since November 2014 · 2014KUJO01
John Ku has been competing for 12 years. His best event is the 3×3: a personal-best single of 10.04, set at Bay Area Speedcubin' 20 2019, puts him in the top 7.6% of the 284,439 people who have ever been ranked in the event, and 4,162nd in the United States. Until May 2007, no official 3×3 solve in the world had been that fast. Across 21 competitions since November 2014, he has put 231 official solves on the record across three events. Solve to solve, his 3×3 times vary about 12% around a typical one, steadier than 69% of the 35,811 competitors with ten or more counted rounds. His 3×3 best has come down from 23.94 in November 2014 to 10.04, a 58% improvement. John has entered 21 competitions, more competitions than 97% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | United States | |
|---|---|---|---|---|---|
| 3×3 | 10.04 | 11.68 | top 7.6% | 4,162 / 59,724 | |
| 2×2 | 3.21 | 4.78 | top 16.7% | 6,555 / 40,951 | |
| 3×3 one-handed | 23.88 | 28.43 | top 31.2% | 4,035 / 15,683 |
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
- 12 Sep 2015Three personal bests in one day at Berkeley Summer 2015.
- 12 Apr 2015First sub-15 3×3: 14.96 at Berkeley Spring 2015.
- 21 Feb 2015First sub-20 3×3: 18.83 at Berkeley Winter 2015.
- 23 Nov 2014First competition: Berkeley Fall 2014. A 23.94 3×3 single to start from.
Competitions
- Kanto Summer 2026 · 29 Aug 2026
- Belmont Spring 2026 · 2 May 2026
- Bay Area Speedcubin' 21 2019 · 1 Dec 2019
- Berkeley Fall 2019 · 10 Nov 2019
- Bay Area Speedcubin' 20 2019 · 12 Oct 2019 — 2 personal bests set
- Berkeley Summer 2019 · 21 Sep 2019 — 1 personal best set
- Bay Area Speedcubin' 17 2019 · 1 Jun 2019 — 1 personal best set
- Berkeley Spring 2019 · 21 Apr 2019 — 1 personal best set
- Berkeley Fall 2018 · 17 Nov 2018
- Berkeley Summer 2018 · 15 Sep 2018
- West Coast Cubing Tour - Cupertino 2018 · 15 Jul 2018 — 2 personal bests set
- Berkeley Spring 2016 · 10 Apr 2016
- Berkeley Winter 2016 · 20 Feb 2016
- Berkeley Fall 2015 · 22 Nov 2015
- Hayward Rubik's Rumble 2015 · 7 Nov 2015 — 1 personal best set
- Berkeley Summer 2015 · 12 Sep 2015 — 3 personal bests set
- BASC 7 2015 · 11 Jul 2015 — 1 personal best set
- Berkeley Spring 2015 · 12 Apr 2015 — 1 personal best set
- BASC 5: Everything But 2x2 2015 · 28 Feb 2015
- Berkeley Winter 2015 · 21 Feb 2015 — 2 personal bests set
- Berkeley Fall 2014 · 23 Nov 2014
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.
- Paul Mahvi — met in 36 rounds, finished ahead once
- Ryan Jew — met in 35 rounds, finished ahead 6 times
- Riley Woo — met in 34 rounds, never finished ahead
Next targets
- A sub-10 3×3 single — 21,172 people have one; it is 0.04 away.
- A sub-3 2×2 single — 26,570 people have one; it is 0.21 away.
Targets move as he improves.