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The Middle Three
People → Republic of Korea → Joon Cha (차준혁)

People · Republic of Korea

Joon Cha (차준혁)

2×2 · top 2.2% of 186,767 all-time · competing since August 2012 · 2012CHAJ01

Joon Cha (차준혁) has been competing for 14 years. His best event is the 2×2: a personal-best single of 1.50, set at National Capital Region 2013, puts him in the top 2.2% of the 186,767 people who have ever been ranked in the event, and 64th in Republic of Korea. Until November 2008, no official 2×2 solve in the world had been that fast. Across 53 competitions since August 2012, he has put 1,565 official solves on the record across 17 events. Solve to solve, his 3×3 times vary about 13% around a typical one, steadier than 52% of the 35,811 competitors with ten or more counted rounds. His 3×3 best has come down from 13.38 in August 2012 to 7.69, a 43% improvement. Joon has entered 53 competitions, more competitions than 99% of everyone who has ever competed.

2×2
best event — top 2.2% of 186,767 all-time
1.50
signature single · National Capital Region 2013
1,565
official solves on the record
13%
solve-to-solve spread · steadier than 52% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingRepublic of Korea
2×21.503.22
top 2.2%64 / 2,319
3×37.699.33
top 2.3%135 / 4,352
3×3 Fewest Moves23 moves26.67
top 3.0%8 / 173
Pyraminx3.897.17
top 7.1%117 / 1,271
3×3 one-handed14.9718.83
top 8.1%114 / 966
4×436.8941.35
top 8.6%171 / 1,308
Skewb3.656.93
top 8.6%92 / 854
Clock7.408.34
top 12.6%83 / 536
3×3 blindfolded1:03.411:27.12
top 14.2%40 / 217
5×51:13.721:20.35
top 14.3%150 / 716
Megaminx1:09.681:17.23
top 15.4%106 / 524
3×3 Multi-Blind12 of 13 cubes · 59:27
top 15.5%15 / 74
6×62:22.362:35.22
top 21.7%99 / 329
Square-118.9027.35
top 25.5%115 / 371
7×73:54.914:17.27
top 28.8%100 / 254
4×4 blindfolded6:54.807:38.18
top 36.1%28 / 48
5×5 blindfolded18:05.00
early days — 3 solves22 / 33

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

Toronto Summer 2012: 13.38Toronto Open Winter 2013: 11.69Montréal Open 2013: 11.25National Capital Region 2013: 11.81Canadian Open 2013: 11.47Montréal Open 2014: 10.00Toronto Open Spring 2014: 9.53National Capital Region 2014: 10.05Busan Summer 2014: 9.893x3x3 HanMaDang 2017: 8.39Daegu Hot Spring 2023: 10.26Seoul Spring 2023: 11.62Rubik's WCA World Championship 2023: 8.86Suncheon Fall 2023: 9.37Korean Championship 2023: 8.13Seoul Open 2024: 8.79Anyang Haseyo 2024: 8.66Prime Cubing Day Seoul 2024: 9.36GA Cuber Jackets Fall 2024: 9.27Atlanta Algs at AIS 2025: 9.12GA Cuber Jackets Spring 2025: 7.69Middle Georgia Big Cube Showdown 2025: 7.96Cubing in School Westminster 2025: 9.12Cube Against Cancer Roswell 2025: 8.93CubingUSA Southeast Championship 2025: 8.81Atlanta Algs at AIS Autumn 2025: 8.76GA Cuber Jackets Fall 2025: 8.70Korean Championship 2025: 9.80Georgia Championship 2026: 8.40Marietta Monday Mini I 2026: 9.39Marietta the Gathering 2026: 8.68Marietta Monday Mini II 2026: 10.07Middle Georgia March Madness 2026: 8.19Marietta Monday Mini III 2026: 10.76Cube Against Cancer Roswell 2026: 9.62Georgia Tech Tuesday Tiny I 2026: 9.57GA Cuber Jackets Spring 2026: 8.64GA Cubers Pride 2026: 7.927.6913.3818 Aug 201220 Jun 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.

  • Daniel Mullen — met in 163 rounds, finished ahead 19 times
  • Katie Hull — met in 157 rounds, finished ahead 10 times
  • Clay Moore — met in 147 rounds, finished ahead 114 times

Next targets

  • A sub-1 2×2 single — 1,032 people have one; it is 0.50 away.
  • A sub-6 3×3 single — 1,376 people have one; it is 1.69 away.

Targets move as he improves.