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The Middle Three
People → Hong Kong, China → Sky Guo (郭建欣)

People · Hong Kong, China

Sky Guo (郭建欣)

2×2 · top 0.0011% of 186,767 all-time · competing since July 2016 · 2016GUOS02

Sky Guo (郭建欣) has been competing for 10 years. His best event is the 2×2: a personal-best single of 0.41, set at Hefei Open 2025, puts him in the top 0.0011% of the 186,767 people who have ever been ranked in the event, and 1st in Hong Kong, China. Until October 2025, no official 2×2 solve in the world had been that fast. Across 31 competitions since July 2016, he has put 640 official solves on the record across three events. Solve to solve, his 3×3 times vary about 14% around a typical one; 72% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 24.47 in July 2016 to 7.18, a 71% improvement. Sky has entered 31 competitions, more competitions than 98% of everyone who has ever competed.

2×2
best event — top 0.0011% of 186,767 all-time
0.41
signature single · Hefei Open 2025
640
official solves on the record
14%
solve-to-solve spread · wider than 72% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingHong Kong, China
2×20.411.29
top 0.0011%1 / 855
3×37.188.83
top 1.5%36 / 1,347
Skewb3.495.69
top 7.7%31 / 285

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

Hefei Open 2016: 24.47Yangzhou Open 2016: 16.75Asian Championship 2016: 19.59Nanjing Spring 2017: 13.82China Championship 2017: 12.63Yangzhou Open 2017: 10.43Hefei Open 2017: 11.13Nanjing Autumn 2017: 10.85Zhenjiang Open 2017: 11.59Hubei University Shahu Spring 2018: 9.90Nanjing Spring 2018: 9.76You May Open 2018: 9.88Xuzhou Open 2018: 9.71Hefei Summer 2018: 10.50WIT Open 2018: 9.05Wuhu Open 2018: 10.75Hefei Spring 2019: 7.59Wuhu Open 2019: 9.43Xuzhou Spring 2019: 7.72AHAU Open 2019: 7.92China Championship 2019: 8.65Xuzhou Winter 2019: 8.05Wuxi Winter 2019: 7.37Shaoxing Morning 2021: 7.97Hangzhou Open AM 2021: 8.09Hong Kong Small Cube Day 2023: 8.80Rubik's WCA World Championship 2023: 7.89Hefei Winter Open 2023: 8.40Ningbo Autumn 2025: 7.57Hefei Open 2025: 7.73Hangzhou Winter 2025: 7.187.1824.4715 Jul 201629 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.

Next targets

  • A sub-6 3×3 single — 1,376 people have one; it is 1.18 away.
  • A sub-3 Skewb single — 3,646 people have one; it is 0.49 away.

Targets move as he improves.