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The Middle Three
People → Republic of Korea → Yul-Hok Sung (성열학)

People · Republic of Korea

Yul-Hok Sung (성열학)

Clock · top 31.8% of 32,048 all-time · competing since January 2007 · 2007YULH01

Yul-Hok Sung (성열학) has been competing for 20 years. His best event is the Clock: a personal-best single of 11.34, set at Brown Fall Seongnam 2024, puts him in the top 31.8% of the 32,048 people who have ever been ranked in the event, and 211th in Republic of Korea. Across 56 competitions since January 2007, he has put 934 official solves on the record across 13 events. Solve to solve, his 3×3 times vary about 12% around a typical one, steadier than 69% of the 35,811 competitors with ten or more counted rounds. His 3×3 best has come down from 1:00.81 in January 2007 to 18.85, a 69% improvement. He has entered 56 competitions, more competitions than 99% of everyone who has ever competed.

Clock
best event — top 31.8% of 32,048 all-time
11.34
signature single · Brown Fall Seongnam 2024
934
official solves on the record
12%
solve-to-solve spread · steadier than 69% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingRepublic of Korea
Clock11.3413.36
top 31.8%211 / 536
3×318.8521.29
top 36.7%1,913 / 4,352
2×25.217.52
top 41.9%1,218 / 2,319
4×41:09.791:25.88
top 46.7%775 / 1,308
3×3 Fewest Moves40 moves48.67
top 48.3%90 / 173
Skewb9.8416.31
top 53.9%511 / 854
Pyraminx10.7812.32
top 58.9%832 / 1,271
Megaminx2:40.023:05.40
top 66.0%384 / 524
5×52:31.552:42.26
top 66.5%533 / 716
3×3 one-handed45.5652.20
top 72.2%792 / 966
6×65:10.435:48.32
top 83.4%287 / 329
Square-11:00.651:20.39
top 84.1%333 / 371
7×78:02.958:15.51
top 88.7%247 / 254

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

KCRC Championship 2007: 1:00.81KCRC Busan competition 2007: 44.67KCA Korea Open 2008: 55.81Korean Championship 2011: 43.38Seoul Winter 2019: 34.73Cutory Blossom 2019: 34.47Play Cube X4 2019: 29.30Cubing Operating System Summer 2019: 34.00Cube Camp in Wonju 2019: 31.95Korean Championship 2019: 31.91Daegu Autumn Open 2019: 30.35Cubing Korea 2019: 28.66ByeolLae Open 2020: 29.86Korean Spring 2022: 23.56Seoul Summer 2022: 23.85Korean Championship 2022: 20.98Daegu Hot Autumn 2022: 22.09KAIST Fall 2022: 24.90Daegu Hot Spring 2023: 21.70Seoul Spring 2023: 23.40Rubik's WCA World Championship 2023: 25.46Suncheon Fall 2023: 21.18Hamchang Open 2023: 22.26Seoul Open 2024: 20.74Daegu Cold Winter 2024: 24.55Anyang Haseyo 2024: 20.30Prime Cubing Day Seoul 2024: 21.22Ansan Summer 2024: 22.06Korean Championship 2024: 21.39Brown Fall Seongnam 2024: 19.03Seoul Winter 2024: 21.40Anyang Haseyo 2025: 22.11Korea Newcomers PM 2025: 21.08Suwon Summer 2025: 22.86Korea Open 2025: 20.43Ansan Favorites 2026: 23.68Seoul Spring 2026: 20.97Anyang Haseyo 2026: 18.85Seoul Summer 2026: 22.6218.851:00.817 Jan 200719 Jul 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-10 Clock single — 8,040 people have one; it is 1.34 away.
  • A sub-15 3×3 single — 69,493 people have one; it is 3.85 away.

Targets move as he improves.