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The Middle Three
People → Hong Kong, China → Kevin Chau Ka Wai (周嘉偉)

People · Hong Kong, China

Kevin Chau Ka Wai (周嘉偉)

2×2 · top 3.9% of 186,767 all-time · competing since July 2008 · 2008WAIC01

Kevin Chau Ka Wai (周嘉偉) has been competing for 18 years. His best event is the 2×2: a personal-best single of 1.85, set at Hong Kong Open 2017, puts him in the top 3.9% of the 186,767 people who have ever been ranked in the event, and 49th in Hong Kong, China. Until February 2008, no official 2×2 solve in the world had been that fast. Across 29 competitions since July 2008, he has put 1,078 official solves on the record across ten events. Solve to solve, his 3×3 times vary about 13% around a typical one, steadier than 58% of the 35,811 competitors with ten or more counted rounds. His 3×3 best has come down from 25.50 in July 2008 to 8.90, a 65% improvement. Kevin has entered 29 competitions, more competitions than 98% of everyone who has ever competed.

2×2
best event — top 3.9% of 186,767 all-time
1.85
signature single · Hong Kong Open 2017
1,078
official solves on the record
13%
solve-to-solve spread · steadier than 58% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingHong Kong, China
2×21.852.96
top 3.9%49 / 855
3×38.9010.33
top 4.6%135 / 1,347
4×433.3638.13
top 5.3%49 / 423
Pyraminx5.409.22
top 15.8%100 / 431
3×3 one-handed19.0925.17
top 18.0%111 / 361
5×51:20.471:28.66
top 19.5%77 / 192
Square-127.2235.76
top 44.0%75 / 126
3×3 blindfolded3:20.34—
top 58.2%51 / 65
3×3 Multi-Blind1 of 2 cubes · 6:04—
early days — 1 solve24 / 25
Skewb33.98—
early days — 1 solve286 / 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

Hong Kong Open 2008: 25.50Hong Kong Open 2009: 15.19Macau Rubik's Open 2009: 13.18Shenzhen Summer Open 2009: 12.81Guangdong Open 2009: 12.53Hong Kong Cube Day 2010: 13.65Hong Kong Open 2010: 9.81Asian Championship 2012: 9.56Guangdong Open 2013: 10.27Guangdong Open 2014: 8.90Back To Cubing Hong Kong 2015: 10.52Hong Kong Spring Cube Day 2015: 10.05Hong Kong Summer Cube Day 2015: 9.83China Championship 2015: 10.54Arnold Classic Asia 2016: 10.61Hong Kong Cube Day 2017: 10.15World Rubik's Cube Championship 2017: 9.24Cross-strait Cubing Exchange 2017: 8.93Hong Kong Open 2017: 9.73China's 10th Anniversary Championship 2017: 10.05Cross-strait Cubing Exchange 2018: 9.69WCA Asian Championship 2018: 11.08Hong Kong Cube Day 2019: 10.27WCA World Championship 2019: 9.03Reading Spring 2023: 9.29Rubik's WCA World Championship 2023: 9.37Rubik's UK Championship 2024: 11.24Rubik's WCA World Championship 2025: 10.118.9025.5027 Jul 20083 Jul 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-1 2×2 single — 1,032 people have one; it is 0.85 away.
  • A sub-8 3×3 single — 7,931 people have one; it is 0.90 away.

Targets move as he improves.