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The Middle Three
People → Republic of Korea → Ko Youngjin (고영진)

People · Republic of Korea

Ko Youngjin (고영진)

3×3 blindfolded · top 0.82% of 12,178 all-time · competing since August 2007 · 2007YOUN04

Ko Youngjin (고영진) has been competing for 19 years. His best event is the 3×3 blindfolded: a personal-best single of 18.14, set at Korea Open 2026, puts him in the top 0.82% of the 12,178 people who have ever been ranked in the event, and 3rd in Republic of Korea. Until November 2017, no official 3×3 blindfolded solve in the world had been that fast. Across 111 competitions since August 2007, he has put 3,195 official solves on the record across 17 events. Solve to solve, his 3×3 times vary about 12% around a typical one, steadier than 62% of the 35,811 competitors with ten or more counted rounds. His 3×3 best has come down from 14.93 in August 2007 to 7.84, a 47% improvement. Ko has entered 111 competitions, more competitions than 99% of everyone who has ever competed.

3×3 blindfolded
best event — top 0.82% of 12,178 all-time
18.14
signature single · Korea Open 2026
3,195
official solves on the record
12%
solve-to-solve spread · steadier than 62% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingRepublic of Korea
3×3 blindfolded18.1426.24
top 0.82%3 / 217
3×3 Fewest Moves22 moves25.00
top 2.2%6 / 173
2×21.532.94
top 2.3%66 / 2,319
3×37.849.45
top 2.5%155 / 4,352
Pyraminx2.986.13
top 3.6%64 / 1,271
4×431.2738.35
top 3.6%77 / 1,308
Megaminx49.861:01.27
top 5.1%39 / 524
3×3 one-handed14.9518.19
top 8.0%113 / 966
3×3 Multi-Blind16 of 17 cubes · 54:24—
top 8.4%7 / 74
5×51:05.171:10.27
top 8.5%93 / 716
Square-114.1323.23
top 14.4%58 / 371
6×62:11.562:22.07
top 16.0%76 / 329
Clock8.279.99
top 16.5%115 / 536
Skewb4.926.97
top 17.5%183 / 854
7×73:38.383:46.40
top 22.8%81 / 254
4×4 blindfolded5:32.387:44.96
top 25.9%20 / 48
5×5 blindfolded13:32.0019:28.00
top 35.1%13 / 33

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

KCRC Busan competition 2007: 14.93KCA Korea Open 2008: 15.843x3x3 HanMaDang 2017: 12.18Play Cube 2017: 13.37Korean Championship 2017: 11.16CWR Fall 2017: 13.84Jeju Open 2017: 12.11Korean CWR Style 2017: 9.87Cubedu Korea 2018: 10.81CWR Winter 2018: 10.50Play Cube 2018: 11.28Korean Championship 2018: 10.42CWR Fall 2018: 11.38Cutory Autumn Open 2018: 10.20Busan Winter 2018: 12.45Japan Championship 2018: 10.09Korea Winter 2019: 11.57Seoul Winter 2019: 8.65Cutory Blossom 2019: 10.25Play Cube X4 2019: 10.18Cubing Operating System Summer 2019: 11.18Cube Camp in Wonju 2019: 10.45Korean Championship 2019: 11.63Daegu Autumn Open 2019: 11.05Taiwan Championship 2019: 10.52Cubing Korea 2019: 9.55ByeolLae Open 2020: 10.80Korean Championship Mini 2021: 10.51Korean Spring 2022: 9.55Seoul Summer 2022: 8.59Korean Championship 2022: 10.89Daegu Hot Autumn 2022: 12.63Cubing SimCheong Open 2022: 8.46KAIST Fall 2022: 11.37Taiwan Championship 2022: 10.59Singapore Championship 2023: 11.97Daegu Hot Spring 2023: 10.92Seoul Spring 2023: 8.92Rubik's WCA World Championship 2023: 9.96Visayas Championship 2023: 10.98Suncheon Fall 2023: 9.21Hamchang Open 2023: 10.06Taiwan Championship 2023: 8.84Korean Championship 2023: 8.74Seoul Open 2024: 9.20Daegu Cold Winter 2024: 9.46Anyang Haseyo 2024: 8.30Busan Spring 2024: 9.71Prime Cubing Day Seoul 2024: 9.03Korea Qualifier - Seoul B 2024: 9.10Ansan Summer 2024: 9.16Korean Championship 2024: 8.94Brown Fall Seongnam 2024: 9.81Rubik's WCA Asian Championship 2024: 9.48Hamchang Winter 2024: 9.07Taiwan Championship 2024: 8.86Seoul Winter 2024: 9.76Happy Suseong 2025: 9.63Anyang Haseyo 2025: 9.88Korea Newcomers AM 2025: 9.71Tokyo Spring AM 2025: 9.26Daejeon Spring 2025: 9.88Kansai Odd and BLD 2025: 10.38Osan Summer 2025: 9.16Suwon Summer 2025: 9.08Korea Open 2025: 9.73We Laugh Pohanghang 2025: 10.56Okcheon Autumn Breeze 2025: 8.96Mongolian Championship 2025: 8.97Uhseo Osong 2025: 8.86Taiwan Championship 2025: 8.14Korean Championship 2025: 10.25Seoul Winter 2026: 7.93Cube Camp in Jeju 2026: 10.35Seoul Spring 2026: 7.84Anyang Haseyo 2026: 9.77Hamoye Jinju 2026: 7.89Uhseo Osong 2026: 9.29Taipei Cube Open 2026: 9.19Seoul Summer 2026: 8.66Korea Open 2026: 8.777.8415.8412 Aug 200715 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-15 3×3 blindfolded single — 19 people have one; it is 3.14 away.
  • A sub-1 2×2 single — 1,032 people have one; it is 0.53 away.

Targets move as he improves.