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The Middle Three
People → Hong Kong, China → Jeffers Chan

People · Hong Kong, China

Jeffers Chan

Square-1 · top 1.5% of 25,272 all-time · competing since August 2017 · 2017TUNG16

Jeffers Chan has been competing for 9 years. His best event is the Square-1: a personal-best single of 6.81, set at On the Side South Australia 2024, puts him in the top 1.5% of the 25,272 people who have ever been ranked in the event, and 7th in Hong Kong, China. Until April 2017, no official Square-1 solve in the world had been that fast. Across 25 competitions since August 2017, he has put 1,183 official solves on the record across 15 events. Solve to solve, his 3×3 times vary about 13% around a typical one; 58% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 12.49 in August 2017 to 8.41, a 33% improvement. Jeffers has entered 25 competitions, more competitions than 98% of everyone who has ever competed.

Square-1
best event — top 1.5% of 25,272 all-time
6.81
signature single · On the Side South Australia 2024
1,183
official solves on the record
13%
solve-to-solve spread · wider than 58% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingHong Kong, China
Square-16.818.58
top 1.5%7 / 126
4×429.4737.08
top 2.5%24 / 423
3×38.419.56
top 3.6%106 / 1,347
2×21.893.23
top 4.1%54 / 855
3×3 Fewest Moves26 moves33.33
top 6.2%16 / 76
3×3 one-handed14.7817.35
top 7.7%45 / 361
6×61:52.442:11.77
top 8.1%21 / 87
Pyraminx4.166.60
top 8.5%61 / 431
5×51:05.771:12.02
top 8.9%42 / 192
Skewb3.946.39
top 10.5%40 / 285
Megaminx1:04.301:08.82
top 12.2%33 / 154
7×73:25.683:40.57
top 18.3%27 / 74
Clock11.0912.71
top 30.6%75 / 156
3×3 blindfolded2:05.02—
top 35.1%35 / 65
3×3 Multi-Blind2 of 3 cubes · 20:23—
early days — 1 solve23 / 25

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 2017: 12.49Australian Nationals 2018: 10.04Hong Kong Cube Day 2019: 11.25Koalafication Melbourne 2019: 12.06WCA World Championship 2019: 10.53Altona Algorithms 2019: 9.09Adelaide Twin Sunday 2021: 8.41SA State Championship 2021: 9.41Adelaide Autumn 2022: 8.97Clare Valley Cubing 2022: 9.58South Australian Open 2022: 8.82Adelaide Winter Sunday 2023: 9.49South Australian Open 2023: 10.40Adelaide Summer 2024: 8.56Half Turns in Hallett Cove 2024: 9.23Northern Adelaide Cubing 2024: 8.52SA State Championship 2025: 10.32Kubing in Klemzig 2025: 8.75Adelaide Autumn 2026: 8.508.4112.4926 Aug 201712 Apr 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-6 Square-1 single — 201 people have one; it is 0.81 away.
  • A sub-25 4×4 single — 588 people have one; it is 4.47 away.

Targets move as he improves.