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People → Japan → Kou Oobatake (大畠功)

People · Japan

Kou Oobatake (大畠功)

Square-1 · top 4.4% of 25,272 all-time · competing since March 2007 · 2007OOBA01

Kou Oobatake (大畠功) has been competing for 20 years. His best event is the Square-1: a personal-best single of 8.91, set at Kansai Fall 2017, puts him in the top 4.4% of the 25,272 people who have ever been ranked in the event, and 13th in Japan. Until October 2010, no official Square-1 solve in the world had been that fast. Across 112 competitions since March 2007, he has put 1,062 official solves on the record across 17 events. Solve to solve, his 3×3 times vary about 15% around a typical one; 86% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His Square-1 best has come down from 24.75 in July 2012 to 8.91, a 64% improvement. Kou has entered 112 competitions, more competitions than 99% of everyone who has ever competed.

Square-1
best event — top 4.4% of 25,272 all-time
8.91
signature single · Kansai Fall 2017
1,062
official solves on the record
15%
solve-to-solve spread · wider than 86% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingJapan
Square-18.9111.68
top 4.4%13 / 245
2×22.696.03
top 10.8%148 / 1,021
3×3 blindfolded55.901:27.53
top 11.7%60 / 282
3×3 Fewest Moves30 moves34.67
top 14.8%63 / 201
3×313.0515.23
top 17.6%745 / 3,329
3×3 Multi-Blind8 of 8 cubes · 59:27—
top 25.5%45 / 128
3×3 one-handed24.1828.69
top 32.0%260 / 529
5×5 blindfolded13:36.00—
early days — 2 solves21 / 50
4×41:02.551:16.09
top 39.2%377 / 667
Clock13.4415.27
top 41.5%148 / 263
4×4 blindfolded7:38.70—
top 41.8%28 / 81
5×51:56.562:16.35
top 47.1%251 / 420
Pyraminx10.8813.11
top 59.7%506 / 688
Skewb11.5817.64
top 63.9%273 / 338
Megaminx2:46.183:03.67
top 68.6%276 / 313
6×65:34.695:41.64
early days — 3 solves191 / 209
7×78:00.558:20.40
early days — 3 solves168 / 188

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

Kansai Star Festival 2012: 24.75Cube Camp in Kanazawa 2012: 16.41Japan Open 2012: 21.93Kansai Open 2013: 16.88Cherry Blossom Viewing Open 2013: 19.06Japan Open 2013: 19.83Cube Camp in Kanazawa 2013: 14.63East Osaka 2013: 15.03Kyushu Open 2013: 14.52Kanto Open 2014: 16.05Kansai Open 2014: 15.34JRCA Kansai Spring 2014: 14.52Cube Camp in Kanazawa 2014: 15.61Asian Championship 2014: 12.33Kyushu Open 2014: 13.93Tokyo Pyraminx Open 2015: 13.81Kansai Open 2015: 13.86Kawasaki Summer 2015: 12.34World Rubik's Cube Championship 2015: 13.10JRCA Kansai Summer 2015: 12.30Cube Camp in Kanazawa 2015: 12.84Japan Open 2015: 11.33Kyushu Open 2015: 12.33JRCA Kansai Winter 2016: 11.15Kansai Open 2016: 13.81Kanto Spring 2016: 11.21Kanto Summer 2016: 13.13JRCA Kansai Summer 2016: 12.69Cube Camp in Kanazawa 2016: 12.55Japan Open 2016: 12.69Kansai Small Cubes 2016: 12.29Kyushu Open 2016: 12.60Kansai Open 2017: 9.72World Rubik's Cube Championship 2017: 11.34Cube Camp in Kanazawa 2017: 11.60Yokohama 2017: 11.66Kansai Fall 2017: 8.91Taiwan Championship 2017: 10.28Japan Open 2017: 12.04Kyushu Open 2017: 12.16Kansai Open 2018: 10.99Kyoto Open 2018: 12.33Kansai Summer 2018: 11.71Cube Camp in Kanazawa 2018: 13.10WCA Asian Championship 2018: 10.28Hiroshima 2018: 12.02Saitama 2018: 10.14Japan Championship 2018: 10.48JRCA Kansai Winter 2019: 12.25Kansai Open 2019: 11.69Reiwa Anniversary 2019: 13.63Tokai Open 2019: 10.85WCA World Championship 2019: 11.74Cube Camp in Kanazawa 2019: 11.91Yono Summer 2019: 10.89Kyoto Open 2019: 14.20Japan Championship 2019: 10.29Ayase 2020: 10.07Rubik's WCA World Championship 2023: 14.69Otsu Biwako Autumn 2023: 11.448.9124.757 Jul 201223 Sep 2023

Best single per competition, Square-1. Faster is higher — the axis is the right way up.

The story so far

Competitions

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.

Next targets

  • A sub-8 Square-1 single — 766 people have one; it is 0.91 away.
  • A sub-2 2×2 single — 8,848 people have one; it is 0.69 away.

Targets move as he improves.