People · Japan
Sayuri Koba (古場小百合)
3×3 · top 9.5% of 284,439 all-time · competing since October 2008 · 2008KOBA02
Sayuri Koba (古場小百合) has been competing for 18 years. Her best event is the 3×3: a personal-best single of 10.68, set at Asian Championship 2014, puts her in the top 9.5% of the 284,439 people who have ever been ranked in the event, and 417th in Japan. Until August 2006, no official 3×3 solve in the world had been that fast. Across 12 competitions since October 2008, she has put 107 official solves on the record across four events. Solve to solve, her 3×3 times vary about 11% around a typical one, steadier than 81% of the 35,811 competitors with ten or more counted rounds. Her 3×3 best has come down from 30.94 in October 2008 to 10.68, a 65% improvement. Sayuri has entered twelve 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 | Japan | |
|---|---|---|---|---|---|
| 3×3 | 10.68 | 13.09 | top 9.5% | 417 / 3,329 | |
| 3×3 one-handed | 20.12 | 22.17 | top 20.8% | 174 / 529 | |
| 2×2 | 7.00 | 7.68 | top 60.4% | 715 / 1,021 | |
| 4×4 | 1:28.03 | 1:40.05 | top 62.1% | 530 / 667 |
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
- 6 Jun 2010First sub-15 3×3: 12.41 at Kawasaki Open 2010.
- 19 Sep 2009First sub-30 3×3: 17.83 at Toyama Open 2009.
- 19 Sep 2009First sub-20 3×3: 17.83 at Toyama Open 2009.
- 4 Oct 2008First competition: Japan Open 2008. A 30.94 3×3 single to start from.
Competitions
- Tokyo Challenge VIII 2023 · 4 Nov 2023
- Japan Championship 2018 · 22 Dec 2018 — 1 personal best set
- Japan Open 2017 · 16 Dec 2017
- Japan Open 2016 · 9 Oct 2016
- Kanto Summer 2016 · 24 Jul 2016
- Kawasaki Spring 2016 · 8 May 2016
- Asian Championship 2014 · 1 Nov 2014 — 1 personal best set
- UT Open 2011 · 27 Nov 2011
- 30th Anniversary MegaHouse Cup 2010 · 24 Jul 2010 — 2 personal bests set
- Kawasaki Open 2010 · 6 Jun 2010 — 2 personal bests set
- Toyama Open 2009 · 19 Sep 2009 — 1 personal best set
- Japan Open 2008 · 4 Oct 2008
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 her.
- Arifumi Fushimi (伏見有史) — met in 23 rounds, finished ahead once
- Nobuaki Suga (菅信昭) — met in 22 rounds, finished ahead 3 times
- Yuhei Takagi (高木佑平) — met in 19 rounds, never finished ahead
Next targets
- A sub-10 3×3 single — 21,172 people have one; it is 0.68 away.
- A sub-20 3×3 one-handed single — 15,081 people have one; it is 0.12 away.
Targets move as she improves.