People · Japan
Shuichi Kuroiwa (黒岩秀一)
Pyraminx · top 20.4% of 129,321 all-time · competing since July 2005 · 2005KURO02
Shuichi Kuroiwa (黒岩秀一) has been competing for 21 years. His best event is the Pyraminx: a personal-best single of 6.06, set at Osaka Open 2008, puts him in the top 20.4% of the 129,321 people who have ever been ranked in the event, and 222nd in Japan. Across 8 competitions since July 2005, he has put 111 official solves on the record across five events. Solve to solve, his 3×3 times vary about 7% around a typical one, an early reading from 7 counted rounds. His 3×3 best has come down from 19.64 in July 2005 to 17.33, a 12% improvement. Shuichi has entered eight competitions, more competitions than 90% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | Japan | |
|---|---|---|---|---|---|
| Pyraminx | 6.06 | 8.99 | top 20.4% | 222 / 688 | |
| 3×3 | 17.33 | 20.37 | top 32.0% | 1,261 / 3,329 | |
| 4×4 | 1:17.44 | 1:26.69 | top 53.8% | 476 / 667 | |
| 2×2 | 8.22 | 9.33 | top 69.2% | 785 / 1,021 | |
| 5×5 | 3:04.39 | 3:49.27 | top 79.5% | 367 / 420 |
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 Nov 2006Four personal bests in one day at Japanese Championship 2006.
- 30 Jul 2006Three personal bests in one day at Tokyo Open 2006.
- 10 Jul 2005First competition: Kyoto Rubik's Cube contest 2005. A 19.64 3×3 single to start from.
Competitions
- Japan Open 2008 · 4 Oct 2008
- Kashiwa Open 2008 · 5 May 2008
- Osaka Open 2008 · 29 Mar 2008 — 1 personal best set
- Japan Open 2007 · 28 Jul 2007 — 1 personal best set
- Japanese Championship 2006 · 12 Nov 2006 — 4 personal bests set
- Tokyo Open 2006 · 30 Jul 2006 — 3 personal bests set
- Japanese Championship 2005 · 3 Sep 2005 — 2 personal bests set
- Kyoto Rubik's Cube contest 2005 · 10 Jul 2005
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.
- Fumiki Koseki (古関章記) — met in 19 rounds, finished ahead 12 times
- Yumu Tabuchi (田渕雄夢) — met in 18 rounds, finished ahead 4 times
- Syoji Takamatsu (高松唱司) — met in 17 rounds, finished ahead 12 times
Next targets
- A sub-6 Pyraminx single — 25,870 people have one; it is 0.06 away.
- A sub-15 3×3 single — 69,493 people have one; it is 2.33 away.
Targets move as he improves.