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The Middle Three
People → Macau, China → Chan Sai Chong (陳世聰)

People · Macau, China

Chan Sai Chong (陳世聰)

2×2 · top 0.39% of 189,179 all-time · competing since September 2018 · 2018CHON01

Chan Sai Chong (陳世聰) has been competing for 8 years. His best event is the 2×2: a personal-best single of 0.91, set at HKRCU 20th Anniversary 2025, puts him in the top 0.39% of the 189,179 people who have ever been ranked in the event, and 1st in Macau, China. Until November 2011, no official 2×2 solve in the world had been that fast. Across 23 competitions since September 2018, he has put 1,238 official solves on the record across 14 events. Solve to solve, his 3×3 times vary about 13% around a typical one; 53% of the 36,406 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 12.40 in September 2018 to 6.87, a 45% improvement. Chan has entered 23 competitions, more competitions than 97% of everyone who has ever competed.

2×2
best event — top 0.39% of 189,179 all-time
0.91
signature single · HKRCU 20th Anniversary 2025
1,238
official solves on the record
13%
solve-to-solve spread · wider than 53% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingMacau, China
2×20.912.06
top 0.39%1 / 34
Square-15.9610.24
top 0.8%1 / 6
4×425.6532.71
top 0.9%2 / 17
3×36.877.92
top 1.2%2 / 53
5×548.6459.14
top 1.4%2 / 8
Skewb2.133.46
top 1.7%1 / 10
Pyraminx2.564.40
top 2.4%2 / 11
Megaminx44.0557.42
top 2.8%1 / 5
3×3 one-handed12.0913.60
top 3.2%2 / 13
Clock5.756.79
top 6.4%3 / 6
7×72:51.332:59.53
top 8.3%2 / 5
6×62:03.172:08.94
top 12.4%2 / 6
3×3 Fewest Moves35 moves38.67
top 30.1%3 / 5
3×3 blindfolded3:29.29—
early days — 1 solve4 / 5

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

Zhongshan NxN Speedcubing 2018: 12.40Hong Kong Cube Day 2019: 11.36Hong Kong Cube Day 2023: 9.67Hong Kong Small Cube Day 2023: 7.81Maru Cube Day 2023: 8.47Hong Kong Championship 2023: 8.19Taiwan Championship 2023: 7.75Shenzhen Open 2023: 7.67Welcome Back Hong Kong 2024: 7.59Maru Cube Day Taiwan 2024: 7.46Hong Kong Cube Day 2024: 7.59Hong Kong Championship 2024: 7.55Hong Kong Cube Day 2025: 6.87Zhuhai Open 2025: 7.64HKRCU 20th Anniversary 2025: 7.43Hong Kong Championship 2025: 6.90Taiwan Championship 2025: 7.84Zhuhai Pi Day 2026: 7.27Odd Day in Hong Kong 2026: 7.95Hong Kong Cube Day 2026: 7.166.8712.409 Sep 201812 Sep 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-5 Square-1 single — 70 people have one; it is 0.96 away.
  • A sub-25 4×4 single — 614 people have one; it is 0.65 away.

Targets move as he improves.