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The Middle Three
People → Republic of Korea → Yi Seung-Woo (이승우)

People · Republic of Korea

Yi Seung-Woo (이승우)

5×5 · top 0.62% of 40,792 all-time · competing since August 2007 · 2007SEUN04

Yi Seung-Woo (이승우) has been competing for 19 years. His best event is the 5×5: a personal-best single of 44.64, set at Hamoye Jinju 2026, puts him in the top 0.62% of the 40,792 people who have ever been ranked in the event, and 9th in Republic of Korea. Until November 2016, no official 5×5 solve in the world had been that fast. Across 57 competitions since August 2007, he has put 1,244 official solves on the record across ten events. Solve to solve, his 3×3 times vary about 13% around a typical one, steadier than 59% of the 35,811 competitors with ten or more counted rounds. His 5×5 best has come down from 2:29.59 in January 2008 to 44.64, a 70% improvement. Yi has entered 57 competitions, more competitions than 99% of everyone who has ever competed.

5×5
best event — top 0.62% of 40,792 all-time
44.64
signature single · Hamoye Jinju 2026
1,244
official solves on the record
13%
solve-to-solve spread · steadier than 59% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingRepublic of Korea
5×544.6450.81
top 0.62%9 / 716
6×61:22.831:32.44
top 0.91%7 / 329
7×72:06.132:14.37
top 0.99%5 / 254
3×37.569.94
top 2.1%122 / 4,352
3×3 one-handed13.2418.92
top 4.8%62 / 966
Square-19.2311.42
top 4.8%21 / 371
Megaminx1:00.641:12.58
top 10.3%70 / 524
3×3 blindfolded1:24.61—
top 21.3%55 / 217
2×24.165.57
top 28.5%854 / 2,319
4×455.3459.92
top 31.1%537 / 1,308

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

KCA Korea Open 2008: 2:29.59Cheonan Cube Championship 2008: 1:26.66Suwon Cube Championship 2008: 1:32.41Seoul Cube Championship 2008: 1:30.81Korea Cube Championship 2009: 1:21.28Korea Cube Championship 2010: 1:19.03Cubing Korea Xmas Eve 2011: 1:11.44Cubing Korea New Years 2012: 1:05.56Cubing Korea January 2012: 1:16.06Korean Style 2013: 1:14.68World Rubik's Cube Championship 2013: 1:01.19Korean Winter 2013: 1:01.84Jeonju Spring 2016: 56.79Korean Championship 2016: 56.24Korean Championship 2017: 1:02.44Jeju Open 2017: 1:01.83Korean Championship 2018: 53.07Korean Championship 2019: 50.63Korean Championship 2022: 48.96Please Big Cubes Korea 2022: 48.66Daegu Hot Spring 2023: 49.46Rubik's WCA World Championship 2023: 49.58Ansan Autumn 2023: 48.65Korean Championship 2023: 52.29Daegu Cold Winter 2024: 48.71Busan Spring 2024: 49.68Prime Cubing Day Seoul 2024: 46.05Korean Championship 2024: 47.17Hamchang Winter 2024: 50.01Taiwan Championship 2024: 46.29Happy Suseong 2025: 50.92Please Big Cubes Korea 2025: 47.70Korea Open 2025: 48.89Okcheon Autumn Breeze 2025: 45.85Korean Championship 2025: 50.42Seoul Winter 2026: 48.70Ansan Favorites 2026: 50.34Seoul Spring 2026: 49.31Hamoye Jinju 2026: 44.64Korea Open 2026: 48.4244.642:29.5920 Jan 200815 Aug 2026

Best single per competition, 5×5. 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-40 5×5 single — 68 people have one; it is 4.64 away.
  • A sub-1:00 6×6 single — 2 people have one; it is 22.83 away.

Targets move as he improves.