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The Middle Three
People → Republic of Korea → Seung Hyeon Sung (성승현)

People · Republic of Korea

Seung Hyeon Sung (성승현)

3×3 · top 0.71% of 284,439 all-time · competing since March 2023 · 2023SUNG02

Seung Hyeon Sung (성승현) has been competing for 3 years. His best event is the 3×3: a personal-best single of 6.34, set at Korea Open 2025, puts him in the top 0.71% of the 284,439 people who have ever been ranked in the event, and 51st in Republic of Korea. Until May 2011, no official 3×3 solve in the world had been that fast. Across 32 competitions since March 2023, he has put 963 official solves on the record across twelve events. Solve to solve, his 3×3 times vary about 15% around a typical one; 79% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 10.97 in April 2023 to 6.34, a 42% improvement. Seung has entered 32 competitions, more competitions than 98% of everyone who has ever competed.

3×3
best event — top 0.71% of 284,439 all-time
6.34
signature single · Korea Open 2025
963
official solves on the record
15%
solve-to-solve spread · wider than 79% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingRepublic of Korea
3×36.348.04
top 0.71%51 / 4,352
4×427.7432.87
top 1.7%42 / 1,308
5×554.4456.94
top 3.2%38 / 716
2×21.812.90
top 3.6%103 / 2,319
Square-18.7612.44
top 4.1%17 / 371
Megaminx50.2656.34
top 5.2%42 / 524
Clock6.057.09
top 7.4%48 / 536
6×61:51.742:07.82
top 7.9%38 / 329
Skewb4.275.98
top 12.8%132 / 854
7×73:08.973:20.55
top 13.0%50 / 254
3×3 one-handed22.0727.62
top 26.3%348 / 966
3×3 Fewest Moves37 moves41.00
early days — 3 solves74 / 173

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

Daegu Hot Spring 2023: 10.97Rubik's WCA World Championship 2023: 9.64Hamchang Open 2023: 8.63Korean Championship 2023: 8.02Seoul Open 2024: 7.97Daegu Cold Winter 2024: 8.27Anyang Haseyo 2024: 7.62Busan Spring 2024: 8.01Prime Cubing Day Seoul 2024: 8.22Korea Qualifier - Seoul A 2024: 6.92Ansan Summer 2024: 7.54Korean Championship 2024: 7.41Hamchang Winter 2024: 7.01Seoul Winter 2024: 8.67Happy Suseong 2025: 7.36Anyang Haseyo 2025: 8.12Korea Newcomers AM 2025: 7.19Daejeon Spring 2025: 7.94Osan Summer 2025: 7.67Suwon Summer 2025: 7.25Korea Open 2025: 6.34Okcheon Autumn Breeze 2025: 6.43Korean Championship 2025: 7.08Seoul Winter 2026: 6.48Cube Camp in Jeju 2026: 7.02Seoul Spring 2026: 7.346.3410.9715 Apr 202322 Mar 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 0.34 away.
  • A sub-25 4×4 single — 588 people have one; it is 2.74 away.

Targets move as he improves.