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The Middle Three
People → Republic of Korea → Jihoon Ha (하지훈)

People · Republic of Korea

Jihoon Ha (하지훈)

Skewb · top 2.8% of 74,164 all-time · competing since September 2022 · 2022HAJI01

Jihoon Ha (하지훈) has been competing for 4 years. His best event is the Skewb: a personal-best single of 2.46, set at Kanto Winter 2026, puts him in the top 2.8% of the 74,164 people who have ever been ranked in the event, and 31st in Republic of Korea. Until February 2014, no official Skewb solve in the world had been that fast. Across 19 competitions since September 2022, he has put 399 official solves on the record across eleven events. Solve to solve, his 3×3 times vary about 16% around a typical one; 90% of the 36,406 competitors with ten or more counted rounds hold a tighter spread. His Skewb best has come down from 5.70 in November 2022 to 2.46, a 57% improvement. Jihoon has entered 19 competitions, more competitions than 96% of everyone who has ever competed.

Skewb
best event — top 2.8% of 74,164 all-time
2.46
signature single · Kanto Winter 2026
399
official solves on the record
16%
solve-to-solve spread · wider than 90% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingRepublic of Korea
Skewb2.462.84
top 2.8%31 / 874
Pyraminx2.954.53
top 3.5%63 / 1,294
2×22.153.17
top 5.9%166 / 2,334
3×310.0611.13
top 7.7%445 / 4,390
3×3 one-handed15.2820.74
top 8.8%122 / 981
Clock6.627.83
top 9.5%64 / 541
Square-114.9021.46
top 16.3%69 / 383
3×3 Fewest Moves31 moves38.67
top 17.5%35 / 173
4×448.3755.21
top 22.7%406 / 1,316
Megaminx2:09.722:40.12
top 51.2%321 / 526
5×52:45.613:15.38
top 73.0%579 / 725

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

KAIST Fall 2022: 5.70Ansan Spring 2023: 5.84Rubik's WCA World Championship 2023: 3.90Korean Championship 2023: 3.71Anyang Haseyo 2024: 3.20Daegu Autumn 2024: 3.62Anyang Haseyo 2025: 3.06Korea Open 2025: 2.85We Laugh Pohanghang 2025: 2.58Korean Championship 2025: 2.71Ansan Favorites 2026: 3.62Kanto Winter 2026: 2.46Korea Open 2026: 2.472.465.8420 Nov 202215 Aug 2026

Best single per competition, Skewb. 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-2 Skewb single — 1,031 people have one; it is 0.46 away.
  • A sub-2 Pyraminx single — 1,497 people have one; it is 0.95 away.

Targets move as he improves.