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The Middle Three
People → China → Shifei Dai (代时飞)

People · China

Shifei Dai (代时飞)

3×3 · top 2.2% of 284,439 all-time · competing since May 2015 · 2015DAIS01

Shifei Dai (代时飞) has been competing for 11 years. Her best event is the 3×3: a personal-best single of 7.63, set at China Championship 2019, puts her in the top 2.2% of the 284,439 people who have ever been ranked in the event, and 790th in China. Until July 2008, no official 3×3 solve in the world had been that fast. Across 33 competitions since May 2015, she has put 725 official solves on the record across 17 events. Solve to solve, her 3×3 times vary about 12% around a typical one, steadier than 79% of the 35,811 competitors with ten or more counted rounds. Her 3×3 best has come down from 36.93 in May 2015 to 7.63, a 79% improvement. Shifei has entered 33 competitions, more competitions than 98% of everyone who has ever competed.

3×3
best event — top 2.2% of 284,439 all-time
7.63
signature single · China Championship 2019
725
official solves on the record
12%
solve-to-solve spread · steadier than 79% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingChina
3×37.6310.26
top 2.2%790 / 28,153
Pyraminx3.005.00
top 3.6%435 / 10,224
2×22.974.47
top 13.9%2,167 / 15,796
3×3 blindfolded1:20.622:03.21
top 19.8%271 / 1,183
4×448.3255.05
top 22.5%2,430 / 5,926
Skewb6.349.33
top 28.5%1,753 / 5,004
3×3 one-handed25.4132.83
top 35.3%3,340 / 5,922
Megaminx1:41.411:48.76
top 35.4%1,050 / 1,678
5×51:40.971:52.82
top 36.1%1,624 / 2,816
Square-126.7738.20
top 43.0%739 / 1,362
Clock15.0019.25
top 48.0%1,134 / 1,843
6×64:26.644:43.18
early days — 3 solves1,232 / 1,349
7×76:37.417:03.13
early days — 3 solves1,145 / 1,261
5×5 blindfolded25:24.00—
early days — 1 solve79 / 95
3×3 Fewest Moves49 moves52.33
top 76.8%892 / 1,058
3×3 Multi-Blind4 of 6 cubes · 54:01—
early days — 1 solve223 / 278
4×4 blindfolded17:06.00—
early days — 2 solves138 / 149

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

Nanjing Spring 2015: 36.93Zhengzhou Open 2015: 32.31Hefei Open 2015: 27.03China Championship 2015: 20.84Nanjing Autumn 2015: 27.31Xi'an Cherry Blossom 2016: 17.07Nanjing Spring 2016: 15.69Cube of Odd Numbers 2016: 16.94Suzhou Open 2016: 15.02Hefei Open 2016: 15.84Xi'an Open 2016: 15.67Nanjing Autumn 2016: 13.86Hangzhou Autumn 2016: 12.15Nanjing Spring 2017: 14.12Wuhan NxN Open 2017: 14.28ZUST Open 2017: 11.84Hefei Open 2017: 13.30Nanjing Autumn 2017: 14.03Zhenjiang Open 2017: 12.79Nanjing Spring 2018: 11.56Nanchang Summer Is Coming 2018: 11.87Tangshan Open 2018: 10.94Nanchang Medium & Small Cubes 2018: 11.22Hangzhou Open 2018: 11.22Nanjing Autumn 2018: 9.11Wuhu Open 2018: 10.17Hefei Spring 2019: 8.74Anyang Open 2019: 9.93Wuhu Open 2019: 8.43China Championship 2019: 7.63Nanjing Autumn 2019: 10.447.6336.931 May 20153 Nov 2019

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 her.

Next targets

  • A sub-6 3×3 single — 1,376 people have one; it is 1.63 away.
  • A sub-2 Pyraminx single — 1,476 people have one; it is 1.00 away.

Targets move as she improves.