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The Middle Three
People → Republic of Korea → Yu Byeong-Seon (유병선)

People · Republic of Korea

Yu Byeong-Seon (유병선)

3×3 · top 0.74% of 284,439 all-time · competing since January 2008 · 2008BYEO01

Yu Byeong-Seon (유병선) has been competing for 19 years. His best event is the 3×3: a personal-best single of 6.37, set at Korean Championship 2019, puts him in the top 0.74% of the 284,439 people who have ever been ranked in the event, and 55th in Republic of Korea. Until May 2011, no official 3×3 solve in the world had been that fast. Across 26 competitions since January 2008, he has put 820 official solves on the record across 14 events. Solve to solve, his 3×3 times vary about 10% around a typical one, steadier than 96% of the 35,811 competitors with ten or more counted rounds. His 3×3 best has come down from 24.58 in January 2008 to 6.37, a 74% improvement. Yu has entered 26 competitions, more competitions than 98% of everyone who has ever competed.

3×3
best event — top 0.74% of 284,439 all-time
6.37
signature single · Korean Championship 2019
820
official solves on the record
10%
solve-to-solve spread · steadier than 96% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingRepublic of Korea
3×36.379.79
top 0.74%55 / 4,352
4×429.5433.24
top 2.6%58 / 1,308
2×22.093.49
top 5.4%152 / 2,319
5×51:04.541:08.82
top 8.1%87 / 716
3×3 one-handed16.1418.65
top 10.5%156 / 966
Megaminx1:04.201:12.89
top 12.2%80 / 524
Pyraminx5.226.81
top 14.6%229 / 1,271
Square-117.5824.54
top 22.3%97 / 371
Skewb5.738.54
top 23.7%239 / 854
6×62:30.112:32.91
top 25.7%112 / 329
3×3 Fewest Moves34 moves—
early days — 2 solves52 / 173
7×73:58.724:13.01
top 30.2%104 / 254
Clock14.8218.31
top 47.2%325 / 536
3×3 blindfolded3:40.04—
early days — 2 solves157 / 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

KCA Korea Open 2008: 24.58Cheonan Cube Championship 2008: 15.90Korean Championship 2011: 10.30Cubing Korea Xmas Eve 2011: 10.68Cubing Korea New Years 2012: 10.94Cubing Korea January 2012: 9.15Asian Championship 2012: 9.63Korean Style 2013: 9.65Korean Winter 2013: 9.94Korean KAIST Style 2015: 8.96Korea Winter 2015: 9.48Valentine in Daegu 2016: 8.41Jeonju Spring 2016: 9.33Cube Is Good 2016: 9.39Korean Championship 2016: 8.00KAIST Spring 2017: 8.96Korean Championship 2017: 9.53CWR Fall 2017: 8.54Korean CWR Style 2017: 8.40Korean Championship 2018: 8.28Korean Championship 2019: 6.37Seoul Winter 2024: 8.84Daejeon Spring 2025: 7.20Hamoye Jinju 2026: 8.186.3724.5820 Jan 200816 May 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-6 3×3 single — 1,376 people have one; it is 0.37 away.
  • A sub-25 4×4 single — 588 people have one; it is 4.54 away.

Targets move as he improves.