Sunday 6 September 2026 Rebuilt nightly from the WCA's official results · export of 6 September 2026 · About
The Middle Three
People → Republic of Korea → Hyun-Seo Oh

People · Republic of Korea

Hyun-Seo Oh

3×3 · top 5.4% of 284,439 all-time · competing since October 2015 · 2015HYUN08

Hyun-Seo Oh has been competing for 11 years. Her best event is the 3×3: a personal-best single of 9.22, set at Korean KAIST Style 2015, puts her in the top 5.4% of the 284,439 people who have ever been ranked in the event, and 323rd in Republic of Korea. Until February 2008, no official 3×3 solve in the world had been that fast. Across 5 competitions since October 2015, she has put 124 official solves on the record across six events. Solve to solve, her 3×3 times vary about 12% around a typical one, steadier than 78% of the 35,811 competitors with ten or more counted rounds. She has entered five competitions, more competitions than 83% of everyone who has ever competed.

3×3
best event — top 5.4% of 284,439 all-time
9.22
signature single · Korean KAIST Style 2015
124
official solves on the record
12%
solve-to-solve spread · steadier than 78% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingRepublic of Korea
3×39.2211.94
top 5.4%323 / 4,352
Skewb3.616.72
top 8.4%87 / 854
3×3 one-handed15.3820.72
top 8.9%123 / 966
4×449.0049.70
top 23.5%417 / 1,308
2×24.294.75
top 30.2%897 / 2,319
5×52:19.282:34.08
top 60.7%489 / 716

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 KAIST Style 2015: 9.22Korea Winter 2015: 12.98Jeonju Spring 2016: 10.38Korean Championship 2016: 10.933x3x3 HanMaDang 2017: 10.219.2212.989 Oct 201518 Feb 2017

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 her.

Next targets

  • A sub-8 3×3 single — 7,931 people have one; it is 1.22 away.
  • A sub-3 Skewb single — 3,646 people have one; it is 0.61 away.

Targets move as she improves.