People · China
Jiahe Dai (戴嘉禾)
Pyraminx · top 5.2% of 129,321 all-time · competing since January 2016 · 2016DAIJ01
Jiahe Dai (戴嘉禾) has been competing for 11 years. His best event is the Pyraminx: a personal-best single of 3.43, set at Yunnan Open 2018, puts him in the top 5.2% of the 129,321 people who have ever been ranked in the event, and 617th in China. Until February 2008, no official Pyraminx solve in the world had been that fast. Across 13 competitions since January 2016, he has put 506 official solves on the record across eleven events. Solve to solve, his 3×3 times vary about 14% around a typical one; 63% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 12.65 in January 2016 to 9.20, a 27% improvement. Jiahe has entered 13 competitions, more competitions than 94% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | China | |
|---|---|---|---|---|---|
| Pyraminx | 3.43 | 5.31 | top 5.2% | 617 / 10,224 | |
| Megaminx | 50.51 | 57.92 | top 5.3% | 120 / 1,678 | |
| 3×3 | 9.20 | 11.82 | top 5.3% | 2,059 / 28,153 | |
| Skewb | 3.11 | 4.86 | top 5.5% | 307 / 5,004 | |
| 3×3 one-handed | 14.89 | 21.98 | top 7.9% | 765 / 5,922 | |
| Square-1 | 11.72 | 13.86 | top 9.3% | 140 / 1,362 | |
| 2×2 | 2.72 | 4.10 | top 11.1% | 1,714 / 15,796 | |
| 4×4 | 40.67 | 47.49 | top 12.9% | 1,391 / 5,926 | |
| 5×5 | 1:33.78 | 1:38.54 | top 30.5% | 1,382 / 2,816 | |
| Clock | 14.75 | 17.81 | top 46.9% | 1,106 / 1,843 | |
| 7×7 | 5:43.30 | 5:59.09 | early days — 3 solves | 1,043 / 1,261 |
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
Best single per competition, 3×3. Faster is higher — the axis is the right way up.
The story so far
- 7 Oct 2017Five personal bests in one day at Yunnan Open 2017.
- 28 Jul 2017Three personal bests in one day at China Championship 2017.
- 13 Aug 2016Three personal bests in one day at Xi'an Open 2016.
- 16 Jul 2016Three personal bests in one day at Chongqing Open 2016.
- 5 Jun 2016First sub-10 3×3: 9.56 at Taiyuan Open 2016.
- 5 Jun 2016Three personal bests in one day at Taiyuan Open 2016.
Competitions
- Xi'an 10th Anniversary 2019 · 24 Aug 2019 — 1 personal best set
- Kunming Open 2019 · 26 May 2019
- Yunnan Open 2018 · 6 Oct 2018 — 2 personal bests set
- Nanning Open 2018 · 28 Jul 2018
- Guilin Open 2018 · 10 Jun 2018 — 2 personal bests set
- Yunnan Open 2017 · 7 Oct 2017 — 5 personal bests set
- China Championship 2017 · 28 Jul 2017 — 3 personal bests set
- XJTU Open 2016 · 27 Nov 2016 — 1 personal best set
- Xi'an Open 2016 · 13 Aug 2016 — 3 personal bests set
- Chongqing Open 2016 · 16 Jul 2016 — 3 personal bests set
- Taiyuan Open 2016 · 5 Jun 2016 — 3 personal bests set
- Xi'an Cherry Blossom 2016 · 2 Apr 2016 — 2 personal bests set
- Xi'an New Year 2016 · 2 Jan 2016
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.
- Ming Zheng (郑鸣) — met in 43 rounds, finished ahead 35 times
- Kaiyang Gao (高凯阳) — met in 42 rounds, finished ahead 32 times
- Zijia Feng (冯子甲) — met in 32 rounds, finished ahead 6 times
Next targets
- A sub-3 Pyraminx single — 4,700 people have one; it is 0.43 away.
- A sub-50 Megaminx single — 1,776 people have one; it is 0.51 away.
Targets move as he improves.