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The Middle Three
People → United States → Justin Zhou

People · United States

Justin Zhou

3×3 · top 0.62% of 284,439 all-time · competing since February 2018 · 2018ZHOU08

Justin Zhou has been competing for 9 years. His best event is the 3×3: a personal-best single of 6.20, set at Space City Summer 2023, puts him in the top 0.62% of the 284,439 people who have ever been ranked in the event, and 410th in the United States. Until June 2011, no official 3×3 solve in the world had been that fast. Across 19 competitions since February 2018, he has put 963 official solves on the record across 14 events. Solve to solve, his 3×3 times vary about 13% around a typical one, steadier than 51% of the 35,811 competitors with ten or more counted rounds. His 3×3 best has come down from 17.12 in February 2018 to 6.20, a 64% improvement. Justin has entered 19 competitions, more competitions than 97% of everyone who has ever competed.

3×3
best event — top 0.62% of 284,439 all-time
6.20
signature single · Space City Summer 2023
963
official solves on the record
13%
solve-to-solve spread · steadier than 51% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingUnited States
3×36.208.14
top 0.62%410 / 59,724
4×426.0729.79
top 1.0%172 / 19,072
2×21.332.68
top 1.5%603 / 40,951
5×550.5856.82
top 1.9%155 / 9,401
3×3 one-handed11.1214.70
top 2.0%311 / 15,683
Pyraminx2.854.69
top 3.1%840 / 28,708
Square-18.7112.70
top 4.0%298 / 6,743
6×61:44.901:49.32
top 5.5%188 / 4,196
7×72:43.833:00.81
top 6.3%169 / 3,184
Megaminx56.251:03.62
top 8.0%558 / 7,841
Skewb4.215.26
top 12.4%1,924 / 18,907
Clock7.688.57
top 13.7%1,047 / 8,927
3×3 blindfolded2:15.992:51.69
top 38.6%813 / 2,092
3×3 Multi-Blind2 of 2 cubes · 13:17—
early days — 1 solve509 / 731

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

Howdy Partner 2018: 17.12Bayou Bash 2018: 15.13DFW Cubing Fiesta July 2018: 11.04Katy Cubing 2019: 10.71Houston Fall 2022: 8.04Cubing For Water Winter 2023: 8.20Cedar Park Winter 2023: 7.67Cube Against Cancer Texas 2023: 7.47Houston Spring Side Events 2023: 8.04Space City Summer 2023: 6.20Space City Winter 2024: 7.49Cube Against Cancer Texas 2024: 7.19Turning at Tompkins Spring 2024: 7.40Humble Cube Rumble Summer 2024: 6.60Brazos Cubing Fall 2024: 6.82Austin NxN 2024: 7.32Texas Championship 2024: 7.27DFW Cubing Spring 2025: 6.37Houston Back to School 2025: 7.626.2017.123 Feb 20189 Aug 2025

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.

  • Siddharth Reddy — met in 104 rounds, finished ahead 45 times
  • Ryan Pilat — met in 104 rounds, finished ahead 3 times
  • Matt Lee — met in 103 rounds, finished ahead 79 times

Next targets

  • A sub-6 3×3 single — 1,376 people have one; it is 0.20 away.
  • A sub-25 4×4 single — 588 people have one; it is 1.07 away.

Targets move as he improves.