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The Middle Three
People → China → Jiaheng Dai (戴佳恒)

People · China

Jiaheng Dai (戴佳恒)

Pyraminx · top 34.8% of 129,321 all-time · competing since September 2018 · 2018DAIJ01

Jiaheng Dai (戴佳恒) has been competing for 8 years. His best event is the Pyraminx: a personal-best single of 7.83, set at Longyan Open 2019, puts him in the top 34.8% of the 129,321 people who have ever been ranked in the event, and 3,812th in China. Across 8 competitions since September 2018, he has put 78 official solves on the record across five events. His 2×2 best has come down from 13.27 in September 2018 to 6.43, a 52% improvement. Jiaheng has entered eight competitions, more competitions than 90% of everyone who has ever competed.

Pyraminx
best event — top 34.8% of 129,321 all-time
7.83
signature single · Longyan Open 2019
78
official solves on the record

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingChina
Pyraminx7.8311.62
top 34.8%3,812 / 10,224
2×26.439.63
top 55.3%9,368 / 15,796
3×327.1539.64
top 57.1%17,713 / 28,153
Clock18.63
early days — 1 solve1,376 / 1,843
Skewb12.8415.79
top 70.0%3,678 / 5,004

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

Quanzhou Open 2018: 13.27Longyan Open 2019: 9.99Xiamen Autumn 2019: 7.02Changsha Open 2023: 8.15Nanchang Spring 2024: 8.79Nanchang Spring 2025: 6.436.4313.2716 Sep 201826 Apr 2025

Best single per competition, 2×2. 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 Pyraminx single — 25,870 people have one; it is 1.83 away.
  • A sub-6 2×2 single — 95,042 people have one; it is 0.43 away.

Targets move as he improves.