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The Middle Three
People → Republic of Korea → Seung Hyuk Nahm (남승혁)

People · Republic of Korea

Seung Hyuk Nahm (남승혁)

4×4 · top 0.0095% of 83,917 all-time · competing since December 2013 · 2013NAHM01

Seung Hyuk Nahm (남승혁) has been competing for 13 years. His best event is the 4×4: a personal-best single of 17.05, set at Cube Camp in Jeju 2026, puts him in the top 0.0095% of the 83,917 people who have ever been ranked in the event, and 1st in Republic of Korea. Until November 2021, no official 4×4 solve in the world had been that fast. Across 103 competitions since December 2013, he has put 5,571 official solves on the record across 13 events. Solve to solve, his 3×3 times vary about 11% around a typical one, steadier than 83% of the 35,811 competitors with ten or more counted rounds. His 3×3 best has come down from 9.30 in December 2013 to 4.17, a 55% improvement. Seung has entered 103 competitions, more competitions than 99% of everyone who has ever competed.

4×4
best event — top 0.0095% of 83,917 all-time
17.05
signature single · Cube Camp in Jeju 2026
5,571
official solves on the record
11%
solve-to-solve spread · steadier than 83% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingRepublic of Korea
4×417.0520.74
top 0.0095%1 / 1,308
6×61:00.401:06.46
top 0.017%1 / 329
5×533.1036.31
top 0.02%1 / 716
3×34.175.30
top 0.024%1 / 4,352
7×71:35.311:40.67
top 0.042%1 / 254
3×3 one-handed6.739.70
top 0.043%1 / 966
Megaminx33.7638.30
top 0.53%6 / 524
2×21.181.67
top 0.98%23 / 2,319
Skewb2.405.42
top 2.5%29 / 854
3×3 blindfolded39.1548.20
top 6.6%19 / 217
Pyraminx3.946.37
top 7.4%119 / 1,271
Clock8.979.80
top 19.8%139 / 536
Square-116.7319.82
top 20.3%83 / 371

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 Winter 2013: 9.30Thanks Cubing Day 2014: 8.33Asian Championship 2014: 6.15Korean Christmas Cup 2014: 6.71Happy Sheep Year 2015: 6.79Spring Comes 2015: 6.94Good Cube Show Korea 2015: 7.01Korean KAIST Style 2015: 5.93Korea Winter 2015: 6.22Valentine in Daegu 2016: 6.32Jeonju Spring 2016: 6.43Cube Is Good 2016: 6.16Korean Championship 2016: 6.92Asian Championship 2016: 5.62Busan Winter 2016: 6.53KAIST Spring 2017: 6.05Play Cube 2017: 5.40World Rubik's Cube Championship 2017: 6.40China Championship 2017: 4.90China's 10th Anniversary Championship 2017: 6.32CWR Fall 2017: 5.80Skillcon 2017: 4.99CWR Winter 2018: 6.13Play Cube 2018: 5.36Korean Championship 2018: 6.53WCA Asian Championship 2018: 6.46China Championship 2018: 5.22Cutory Autumn Open 2018: 4.96Busan Winter 2018: 6.16Cutory Blossom 2019: 6.01WCA World Championship 2019: 5.28Cube Camp in Wonju 2019: 6.18Korean Championship 2019: 4.86Daegu Autumn Open 2019: 5.11ByeolLae Open 2020: 5.85Seoul Summer 2022: 5.54Korean Championship 2022: 5.48Daegu Hot Autumn 2022: 5.81Cubing SimCheong Open 2022: 5.71KAIST Fall 2022: 5.97Taiwan Championship 2022: 5.69Singapore Championship 2023: 5.31Daegu Hot Spring 2023: 5.49Selangor Ace Cube 2023: 5.11CubingUSA Nationals 2023: 5.34Rubik's WCA World Championship 2023: 5.57Suncheon Fall 2023: 5.12Hamchang Open 2023: 5.49Malaysia Cube Championship 2023: 5.15Taiwan Championship 2023: 4.97Korean Championship 2023: 4.17Seoul Open 2024: 5.10NxN in Hanoi 2024: 4.87Daegu Cold Winter 2024: 4.91Paradise Park NxNxN 2024: 5.43Anyang Haseyo 2024: 5.61Busan Spring 2024: 5.16Prime Cubing Day Seoul 2024: 4.26Korea Qualifier - Seoul C 2024: 5.28Philippine Championship 2024: 5.12Rubik's WCA North American Championship 2024: 5.63Korean Championship 2024: 5.30Brown Fall Seongnam 2024: 5.28Rubik's WCA Asian Championship 2024: 5.73Cool Down Singapore 2024: 4.67Hamchang Winter 2024: 5.70Taiwan Championship 2024: 4.98Seoul Winter 2024: 4.41Happy Suseong 2025: 5.79Anyang Haseyo 2025: 4.83Paradise Park Bangkok NxNxN 2025: 5.11Korea Newcomers PM 2025: 5.15Tokai Spring 2025: 4.81Daejeon Spring 2025: 5.75Rubik's WCA World Championship 2025: 5.32Suwon Summer 2025: 5.75Korea Open 2025: 5.21We Laugh Pohanghang 2025: 5.33SuNxNter Speedcubing 2025: 4.89Uhseo Osong 2025: 5.29Taiwan Championship 2025: 5.10Korean Championship 2025: 5.24Seoul Winter 2026: 4.77Ansan Favorites 2026: 5.39Cube Camp in Jeju 2026: 4.81Paradise Park Bangkok NxNxN 2026: 4.92Katano Spring 2026: 4.69Anyang Haseyo 2026: 5.52Hamoye Jinju 2026: 5.28Uhseo Osong 2026: 4.89Taipei Cube Open 2026: 5.64Seoul Summer 2026: 4.46Korea Open 2026: 5.404.179.3028 Dec 201315 Aug 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-1:00 6×6 single — 2 people have one; it is 0.40 away.
  • A sub-30 5×5 single — 1 people have one; it is 3.10 away.

Targets move as he improves.