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People → Republic of Korea → Minseo Gu (구민서)

People · Republic of Korea

Minseo Gu (구민서)

3×3 · top 0.18% of 284,439 all-time · competing since December 2014 · 2014GUMI01

Minseo Gu (구민서) has been competing for 12 years. His best event is the 3×3: a personal-best single of 5.28, set at Korean Championship 2023, puts him in the top 0.18% of the 284,439 people who have ever been ranked in the event, and 12th in Republic of Korea. Until April 2015, no official 3×3 solve in the world had been that fast. Across 96 competitions since December 2014, he has put 3,665 official solves on the record across 14 events. Solve to solve, his 3×3 times vary about 13% around a typical one; 53% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 14.26 in December 2014 to 5.28, a 63% improvement. Minseo has entered 96 competitions, more competitions than 99% of everyone who has ever competed.

3×3
best event — top 0.18% of 284,439 all-time
5.28
signature single · Korean Championship 2023
3,665
official solves on the record
13%
solve-to-solve spread · wider than 53% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingRepublic of Korea
3×35.287.28
top 0.18%12 / 4,352
4×423.0328.33
top 0.33%9 / 1,308
5×548.0653.49
top 1.3%18 / 716
3×3 one-handed11.1215.12
top 2.0%24 / 966
6×61:32.771:41.67
top 2.4%13 / 329
2×21.552.60
top 2.4%71 / 2,319
7×72:23.762:35.30
top 2.8%13 / 254
Pyraminx3.025.19
top 3.7%66 / 1,271
Megaminx47.4655.17
top 4.0%30 / 524
Skewb3.105.19
top 5.5%59 / 854
3×3 Fewest Moves28 moves35.00
top 9.9%21 / 173
Clock7.339.72
top 12.3%79 / 536
Square-114.8020.83
top 16.0%65 / 371
3×3 blindfolded1:35.872:32.28
top 25.2%68 / 217

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

Korean Christmas Cup 2014: 14.26Good Cube Show Korea 2015: 13.67Korean KAIST Style 2015: 11.04Korea Winter 2015: 11.21Cube Is Good 2016: 8.89Korean Championship 2016: 7.553x3x3 HanMaDang 2017: 8.98Korean Spring Picnic 2017: 9.80Play Cube 2017: 7.96World Rubik's Cube Championship 2017: 9.59Korean Championship 2017: 7.84CWR Fall 2017: 8.10Skillcon 2017: 8.77Korean CWR Style 2017: 7.96Cubedu Korea 2018: 9.03CWR Winter 2018: 8.48Play Cube 2018: 7.86Korean Championship 2018: 7.03Cutory Autumn Open 2018: 9.08Busan Winter 2018: 7.50Korea Winter 2019: 9.04Korean Championship 2019: 8.47Cubing Korea 2019: 8.25Korean Championship Mini 2021: 8.92Seoul Summer 2022: 8.71Korean Championship 2022: 7.24Daegu Hot Autumn 2022: 8.06Cubing SimCheong Open 2022: 7.15KAIST Fall 2022: 7.80Singapore Championship 2023: 6.79Daegu Hot Spring 2023: 7.83Seoul Spring 2023: 8.85Rubik's WCA World Championship 2023: 7.02Suncheon Fall 2023: 7.05Hamchang Open 2023: 6.88Korean Championship 2023: 5.28Seoul Open 2024: 6.65Melbourne Summer 2024: 6.99Daegu Cold Winter 2024: 6.69Anyang Haseyo 2024: 7.31Busan Spring 2024: 6.91Prime Cubing Day Seoul 2024: 7.55Korea Qualifier - Seoul B 2024: 7.00Ansan Summer 2024: 7.59Maru Cube Day Taiwan 2024: 7.60Korean Championship 2024: 7.32Brown Fall Seongnam 2024: 7.44Hamchang Winter 2024: 7.41Seoul Winter 2024: 9.08Happy Suseong 2025: 6.80Anyang Haseyo 2025: 7.56Korea Newcomers PM 2025: 5.52Tokai Spring 2025: 6.31Daejeon Spring 2025: 6.82Osan Summer 2025: 7.24Suwon Summer 2025: 7.79Korea Open 2025: 8.03We Laugh Pohanghang 2025: 7.33Okcheon Autumn Breeze 2025: 6.58Uhseo Osong 2025: 7.54Korean Championship 2025: 6.72Seoul Winter 2026: 6.95Ansan Favorites 2026: 7.03Cube Camp in Jeju 2026: 7.15Dockin and Clockin Dunkirk 2026: 7.14Pickering Mini Afternoon 2026: 6.42Winnipeg Spring 2026: 6.49Cube Against Cancer Dunkirk 2026: 5.74Championnat Québécois 2026: 7.28Wasaga Beach Spring 2026: 7.16Waterloo Spring 2026: 7.53Rubik's WCA North American Championship 2026: 7.67King of Prussia Summer 2026: 6.16Charlottetown Summer 2026: 7.58Bay Area Speedcubin' 69 2026: 7.795.2814.2620 Dec 201429 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-5 3×3 single — 344 people have one; it is 0.28 away.
  • A sub-20 4×4 single — 42 people have one; it is 3.03 away.

Targets move as he improves.