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People · Australia

Jack Cai

3×3 blindfolded · top 0.44% of 12,178 all-time · competing since November 2014 · 2014CAIJ02

Jack Cai has been competing for 12 years. His best event is the 3×3 blindfolded: a personal-best single of 16.22, set at Koalafication Brisbane 2019, puts him in the top 0.44% of the 12,178 people who have ever been ranked in the event, and 4th in Australia. Until April 2019, no official 3×3 blindfolded solve in the world had been that fast. Across 87 competitions since November 2014, he has put 3,274 official solves on the record across 17 events. Solve to solve, his 3×3 times vary about 14% around a typical one; 63% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 21.33 in November 2014 to 8.05, a 62% improvement. Jack has entered 87 competitions, more competitions than 99% of everyone who has ever competed.

3×3 blindfolded
best event — top 0.44% of 12,178 all-time
16.22
signature single · Koalafication Brisbane 2019
3,274
official solves on the record
14%
solve-to-solve spread · wider than 63% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingAustralia
3×3 blindfolded16.2218.27
top 0.44%4 / 394
3×3 one-handed10.1413.17
top 1.2%31 / 2,659
3×3 Multi-Blind29 of 30 cubes · 59:40—
top 1.9%3 / 180
4×4 blindfolded2:02.254:34.77
top 2.8%6 / 96
3×38.0510.06
top 2.9%282 / 11,709
2×21.903.29
top 4.1%323 / 8,567
Pyraminx3.605.15
top 5.9%261 / 5,993
4×435.5943.64
top 7.3%189 / 3,051
5×5 blindfolded6:45.65—
early days — 3 solves7 / 51
Skewb5.169.60
top 19.4%508 / 3,534
3×3 Fewest Moves32 moves40.33
top 20.4%102 / 468
5×51:42.461:52.80
top 37.2%500 / 1,356
Megaminx1:59.542:17.12
top 45.4%549 / 1,277
6×64:06.044:22.98
top 67.5%412 / 641
Square-156.25—
top 81.2%761 / 899
7×77:25.357:28.19
top 83.9%415 / 523
Clock38.25—
early days — 1 solve1,013 / 1,095

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

Melbourne Cube Day 2014: 21.33Melbourne Autumn 2015: 15.22Cube for Cambodia 2015: 15.90Lifestyle Seasons Winter 2015: 14.22Australian Nationals 2015: 12.56Melbourne Cube Days 2015: 13.02Cubing Classic 2016: 12.92Melbourne Autumn 2016: 11.36Connor's Cube Day 2016: 11.08New Zealand Nationals 2016: 10.77POPS Open 2016: 12.95Sydney Championship 2016: 10.91Adelaide Summer 2017: 10.39Lifestyle Seasons Summer 2017: 9.48Cubing Classic 2017: 11.13Cube for Cambodia 2017: 9.77Sydney Winter 2017: 10.24World Rubik's Cube Championship 2017: 9.49Australian Nationals 2017: 10.10Canberra Spring 2017: 11.50Melbourne Cube Days 2017: 9.40New Zealand Nationals 2017: 10.78Sydney Championship 2017: 9.88ASFA Speedcubing 2018: 11.88Cube for Cambodia 2018: 9.70Melbourne Winter 2018: 12.44Adelaide Winter 2018: 9.99WCA Asian Championship 2018: 10.16Horsham Winter 2018: 10.62Australian Nationals 2018: 10.42St Kevin's College Spring 2018: 12.40Odd Day in Sydney 2018: 11.55Malaysia Cube Championship 2018: 10.29Melbourne Cube Days 2018: 9.30Northside Cube Day 2019: 10.14Adelaide Summer 2019: 10.68Melbourne Summer 2019: 9.70Cool Down Sydney 2019: 8.92Brilliant Ballarat 2019: 10.40Hobart Open 2019: 10.42Koalafication Sydney 2019: 10.01Koalafication Brisbane 2019: 10.25Solving in Sale 2019: 10.11Cube for Cambodia 2019: 8.95Koalafication Adelaide 2019: 9.13Koalafication Melbourne 2019: 10.39Oceania 10th Anniversary 2019: 9.91Warm Up Sydney 2019: 12.48WCA World Championship 2019: 9.48Horsham 2019: 9.50Altona Algorithms 2019: 10.32Puzzling Pakenham 2019: 10.78Japan Championship 2019: 10.09Odd Day in Sydney 2019: 10.64Melbourne Cube Days 2019: 10.35Surf Coast Cubing 2019: 9.82Melbourne Summer 2020: 15.39Bendigo Cube Blitz 2020: 10.13Melbourne Summer 2021: 10.21Barwon Cube for the Kids 2021: 10.93Altona Algorithms Attempt 2 2021: 9.24Melbourne Summer 2022: 10.86Rubik's WCA North American Championship 2022: 10.87Rubik's WCA Oceanic Championship 2022: 10.12Big Tunas 2023: 10.39Capitanejo 2023: 9.52Monterrey Bogotá III 2023: 9.96Rubik's WCA World Championship 2023: 11.61The Big Cube Melbourne 2023: 8.05Cubing at The Game Expo 2024: 9.69Spark Melbourne Spring Saturday 2024: 10.20Spark Melbourne February 2025: 11.34Balam Cubes Jakarta New Year 2026: 9.99Melbourne Summer 2026: 9.76North-East Melbourne March Saturday 2026: 9.34Spark Melbourne Autumn Saturday 2026: 9.548.0521.339 Nov 201423 May 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-15 3×3 blindfolded single — 19 people have one; it is 1.22 away.
  • A sub-10 3×3 one-handed single — 779 people have one; it is 0.14 away.

Targets move as he improves.