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People · United States

Jacob Posner

Skewb · top 1.8% of 73,281 all-time · competing since August 2010 · 2010POSN02

Jacob Posner has been competing for 16 years. His best event is the Skewb: a personal-best single of 2.17, set at San Ramon Cubed 2017, puts him in the top 1.8% of the 73,281 people who have ever been ranked in the event, and 265th in the United States. Until December 2014, no official Skewb solve in the world had been that fast. Across 54 competitions since August 2010, he has put 1,843 official solves on the record across 17 events. Solve to solve, his 3×3 times vary about 14% around a typical one; 62% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 37.30 in August 2010 to 8.66, a 77% improvement. Jacob has entered 54 competitions, more competitions than 99% of everyone who has ever competed.

Skewb
best event — top 1.8% of 73,281 all-time
2.17
signature single · San Ramon Cubed 2017
1,843
official solves on the record
14%
solve-to-solve spread · wider than 62% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingUnited States
Skewb2.174.93
top 1.8%265 / 18,907
3×38.6610.68
top 4.1%2,295 / 59,724
Pyraminx3.248.10
top 4.5%1,171 / 28,708
Square-110.6415.35
top 7.2%529 / 6,743
3×3 one-handed14.7518.82
top 7.6%1,015 / 15,683
2×22.443.49
top 8.3%3,280 / 40,951
4×437.3141.97
top 9.0%1,354 / 19,072
3×3 blindfolded49.281:02.78
top 9.7%191 / 2,092
3×3 Fewest Moves29 moves33.67
top 12.2%280 / 2,040
5×51:24.591:31.14
top 22.9%1,780 / 9,401
3×3 Multi-Blind7 of 7 cubes · 27:18—
top 25.7%189 / 731
Clock10.4612.11
top 27.4%2,101 / 8,927
6×62:37.752:55.54
top 29.6%1,043 / 4,196
Megaminx1:38.801:44.07
top 33.9%2,410 / 7,841
7×74:20.704:31.48
top 37.9%1,062 / 3,184
4×4 blindfolded8:23.64—
top 46.9%188 / 440
5×5 blindfolded38:41.00—
early days — 1 solve210 / 218

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

Nisei Week Open 2010: 37.30Hayward Rubik's Rumble 2015: 16.83Berkeley Fall 2015: 19.36Berkeley Winter 2016: 16.30Berkeley Spring 2016: 14.32TFTI San Diego 2016: 15.03Oregon 2016: 13.47Berkeley Summer 2016: 12.88Hayward Rubik's Rumble 2016: 12.29Reno Fall 2016: 12.69Berkeley Fall 2016: 13.43Skillcon 2016: 11.42Armin Open 2017: 12.05Berkeley Winter 2017: 12.80MVCS Spring 2017: 9.92Qualifornia 2017: 12.91Berkeley Spring 2017: 12.81Reno Spring 2017: 10.74UCSD Summer 2017: 10.836.25 Bay Area 2017: 11.99CubingUSA Nationals 2017: 11.77Northwest Championships 2017: 12.20SacCubing II 2017: 10.60Berkeley Summer 2017: 10.41San Francisco Bay Open 2017: 8.98San Ramon Cubed 2017: 10.95Berkeley Fall 2017: 11.11South Enough 2018: 10.65SacCubing III 2018: 11.09Berkeley Winter 2018: 10.34Bay Area Speedcubin' 11 2018: 11.15Berkeley Spring 2018: 10.27Colorado Qualifier 2018: 9.96CubingUSA Western Championship 2018: 10.08SnoCo Summer 2018: 9.09CubingUSA Northwest Championship 2018: 10.33Berkeley Summer 2018: 10.01Bay Area Speedcubin' 12 2018: 9.72Berkeley Fall 2018: 8.66Bay Area Speedcubin' 14 2019: 9.48Bay Area Speedcubin' 15 2019: 10.17Berkeley Spring 2019: 9.88SnoCo Fall 2019: 10.13Kent Summer 2024: 12.04Tacoma Winter 2025: 11.38Coffee Cup Tacoma 2025: 10.59Kent Fall 2025: 11.088.6637.3021 Aug 201022 Nov 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.

  • Ryan Jew — met in 295 rounds, finished ahead 100 times
  • Riley Woo — met in 269 rounds, finished ahead 52 times
  • Graham Siggins — met in 233 rounds, finished ahead 78 times

Next targets

  • A sub-2 Skewb single — 1,013 people have one; it is 0.17 away.
  • A sub-8 3×3 single — 7,931 people have one; it is 0.66 away.

Targets move as he improves.