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The Middle Three
People → Republic of Korea → Keunsoo Heo (허근수)

People · Republic of Korea

Keunsoo Heo (허근수)

Skewb · top 3.4% of 73,281 all-time · competing since September 2014 · 2014HEOG01

Keunsoo Heo (허근수) has been competing for 12 years. His best event is the Skewb: a personal-best single of 2.63, set at Korean Championship 2017, puts him in the top 3.4% of the 73,281 people who have ever been ranked in the event, and 33rd in Republic of Korea. Until February 2014, no official Skewb solve in the world had been that fast. Across 88 competitions since September 2014, he has put 1,582 official solves on the record across eleven events. Solve to solve, his 3×3 times vary about 13% around a typical one, steadier than 54% of the 35,811 competitors with ten or more counted rounds. His 3×3 best has come down from 20.52 in September 2014 to 10.75, a 48% improvement. Keunsoo has entered 88 competitions, more competitions than 99% of everyone who has ever competed.

Skewb
best event — top 3.4% of 73,281 all-time
2.63
signature single · Korean Championship 2017
1,582
official solves on the record
13%
solve-to-solve spread · steadier than 54% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingRepublic of Korea
Skewb2.634.73
top 3.4%33 / 854
3×310.7514.47
top 9.7%554 / 4,352
2×22.614.83
top 10.0%291 / 2,319
Clock9.3211.00
top 21.6%147 / 536
4×449.6458.03
top 24.3%430 / 1,308
3×3 one-handed23.1932.96
top 29.3%384 / 966
Pyraminx7.2611.87
top 30.0%450 / 1,271
3×3 Fewest Moves36 moves41.67
top 33.6%63 / 173
5×51:48.922:00.45
top 41.8%357 / 716
6×63:44.354:10.03
top 60.3%228 / 329
7×76:27.606:44.67
top 73.8%211 / 254

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

Thanks Cubing Day 2014: 20.52KAIST Fall 2014: 18.49Happy Sheep Year 2015: 17.84Spring Comes 2015: 16.78Good Cube Show Korea 2015: 16.39World Rubik's Cube Championship 2015: 14.81Korean KAIST Style 2015: 12.71Cube Is Good 2016: 10.85Korean Championship 2017: 13.74CWR Fall 2017: 14.14Jeju Open 2017: 13.39Cubedu Korea 2018: 12.97CWR Winter 2018: 14.28Play Cube 2018: 13.47Korean Championship 2018: 14.05WCA Asian Championship 2018: 16.20CWR Fall 2018: 12.35Cutory Autumn Open 2018: 16.55Seoul Winter 2019: 14.53Cutory Blossom 2019: 12.83Play Cube X4 2019: 13.63Cubing Operating System Summer 2019: 14.67Cube Camp in Wonju 2019: 15.48Korean Championship 2019: 12.85Cubing Korea 2019: 14.72ByeolLae Open 2020: 17.08Korean Championship Mini 2021: 13.33Korean Spring 2022: 13.82Seoul Summer 2022: 16.44Korean Championship 2022: 12.80Cubing SimCheong Open 2022: 14.19KAIST Fall 2022: 15.50Daegu Hot Spring 2023: 13.85Seoul Spring 2023: 14.59Rubik's WCA World Championship 2023: 17.22Suncheon Fall 2023: 15.12Hamchang Open 2023: 14.39Korean Championship 2023: 14.92Seoul Open 2024: 13.73Daegu Cold Winter 2024: 14.66Anyang Haseyo 2024: 15.27Prime Cubing Day Seoul 2024: 14.21Korea Qualifier - Seoul A 2024: 13.55Ansan Summer 2024: 14.16Korean Championship 2024: 16.22Brown Fall Seongnam 2024: 15.12Hamchang Winter 2024: 15.06Seoul Winter 2024: 14.18Happy Suseong 2025: 15.10Anyang Haseyo 2025: 10.75Korea Newcomers AM 2025: 15.79Daejeon Spring 2025: 14.90Osan Summer 2025: 14.52Suwon Summer 2025: 14.30Korea Open 2025: 13.28We Laugh Pohanghang 2025: 13.06Okcheon Autumn Breeze 2025: 15.32Uhseo Osong 2025: 17.30Seoul Winter 2026: 13.77Ansan Favorites 2026: 15.80Cube Camp in Jeju 2026: 12.72Seoul Spring 2026: 15.53Anyang Haseyo 2026: 18.03Hamoye Jinju 2026: 14.45Seoul Summer 2026: 14.92Korea Open 2026: 14.3210.7520.5220 Sep 201415 Aug 2026

Best single per competition, 3×3. 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-2 Skewb single — 1,013 people have one; it is 0.63 away.
  • A sub-10 3×3 single — 21,172 people have one; it is 0.75 away.

Targets move as he improves.