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People · United States

Heewon Seo

Megaminx · top 0.032% of 34,786 all-time · competing since February 2017 · 2017SEOH01

Heewon Seo has been competing for 10 years. His best event is the Megaminx: a personal-best single of 25.26, set at Lexing-not-a-ton of NxNs 2024, puts him in the top 0.032% of the 34,786 people who have ever been ranked in the event, and 2nd in the United States. Until March 2022, no official Megaminx solve in the world had been that fast. Across 31 competitions since February 2017, he has put 1,542 official solves on the record across twelve events. Solve to solve, his 3×3 times vary about 12% around a typical one, steadier than 76% of the 35,811 competitors with ten or more counted rounds. His 3×3 best has come down from 14.26 in February 2017 to 6.24, a 56% improvement. Heewon has entered 31 competitions, more competitions than 98% of everyone who has ever competed.

Megaminx
best event — top 0.032% of 34,786 all-time
25.26
signature single · Lexing-not-a-ton of NxNs 2024
1,542
official solves on the record
12%
solve-to-solve spread · steadier than 76% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingUnited States
Megaminx25.2629.75
top 0.032%2 / 7,841
4×423.1926.92
top 0.36%65 / 19,072
3×36.247.29
top 0.64%423 / 59,724
5×547.8152.25
top 1.2%108 / 9,401
6×61:30.311:40.59
top 2.0%76 / 4,196
Pyraminx2.594.06
top 2.4%644 / 28,708
2×21.762.55
top 3.4%1,316 / 40,951
3×3 one-handed12.2916.00
top 3.4%512 / 15,683
Skewb3.105.13
top 5.5%849 / 18,907
7×72:48.602:56.17
top 7.5%201 / 3,184
Clock7.3210.51
top 12.2%935 / 8,927
Square-114.4823.03
top 15.2%1,027 / 6,743

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

For The Love Of Cubing 2017: 14.26Florida Cubing Spring Qualifier 2017: 14.06Cubing Knights 2017: 11.18STEM Educ8 2018: 9.76Windsor Classic 2018: 9.84Dunwoody Day Bash 2019: 7.83Lion Pride 2019: 8.64Gator Cubing Spring Open 2019: 7.88Chipola 2019: 7.38Cubing with Manatees 2020: 7.23Florida Fall 2021: 6.65Baton Rouge Winter 2022: 6.83Florida Spring A 2022: 6.97FSUbers 2022: 6.65FSUbers 2.0 2022: 6.96Rubik's WCA North American Championship 2022: 6.90CubingUSA Southeast Championship 2022: 7.39Tally Spring 2023: 7.50CubingUSA Southeast Championship 2023: 7.73CubingUSA Nationals 2023: 7.34FSUbers 5.0 2024: 6.99Beach Bash Jacksonville 2024: 6.24Lexing-not-a-ton of NxNs 2024: 8.28Rubik's WCA World Championship 2025: 6.92Brown Cubing Day 2026: 7.256.2414.2611 Feb 201721 Feb 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.

  • Sean Hartman — met in 261 rounds, finished ahead 74 times
  • Katie Hull — met in 254 rounds, finished ahead 81 times
  • Tommy Cherry — met in 241 rounds, finished ahead 69 times

Next targets

  • A sub-25 Megaminx single — 8 people have one; it is 0.26 away.
  • A sub-20 4×4 single — 42 people have one; it is 3.19 away.

Targets move as he improves.