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The Middle Three
People → China → Shidong Zhang (张世东)

People · China

Shidong Zhang (张世东)

4×4 · top 2.7% of 83,917 all-time · competing since September 2017 · 2017ZHAS06

Shidong Zhang (张世东) has been competing for 9 years. His best event is the 4×4: a personal-best single of 29.79, set at UCSD TritoNxN 2026, puts him in the top 2.7% of the 83,917 people who have ever been ranked in the event, and 263rd in China. Until April 2012, no official 4×4 solve in the world had been that fast. Across 15 competitions since September 2017, he has put 429 official solves on the record across eleven events. Solve to solve, his 3×3 times vary about 11% around a typical one, steadier than 86% of the 35,811 competitors with ten or more counted rounds. His 3×3 best has come down from 12.43 in September 2017 to 9.30, a 25% improvement. Shidong has entered 15 competitions, more competitions than 95% of everyone who has ever competed.

4×4
best event — top 2.7% of 83,917 all-time
29.79
signature single · UCSD TritoNxN 2026
429
official solves on the record
11%
solve-to-solve spread · steadier than 86% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingChina
4×429.7938.11
top 2.7%263 / 5,926
5×554.821:02.88
top 3.3%148 / 2,816
3×39.3012.31
top 5.6%2,161 / 28,153
7×72:43.972:45.10
top 6.4%130 / 1,261
6×61:51.091:55.88
top 7.6%168 / 1,349
3×3 one-handed20.0425.02
top 20.6%2,052 / 5,922
2×24.555.99
top 33.6%5,746 / 15,796
Pyraminx9.8014.03
top 51.4%5,395 / 10,224
Megaminx2:11.102:23.68
top 51.8%1,343 / 1,678
Clock28.21
early days — 2 solves1,676 / 1,843
3×3 Fewest Moves54 moves
early days — 1 solve998 / 1,058

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

Beijing Ten Years Open 2017: 12.43Inner Mongolia Winter 2018: 12.88Beijing Open 2018: 11.41Beijing Summer 2018: 12.09Cubes on the Bayside 2023: 11.43Los Angeles Newcomers 2024: 11.76Santa Barbara Winter 2025: 11.65Burbank Big Cubes 2025: 10.61Missouri Championship 2025: 12.94Nub Open Trabuco Hills Fall 2025: 9.30UCSD TritoNxN 2026: 10.729.3012.9417 Sep 20174 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.

  • Shane Grogan — met in 31 rounds, finished ahead 3 times
  • Max Park — met in 29 rounds, never finished ahead
  • Alex Lehman — met in 28 rounds, finished ahead 15 times

Next targets

  • A sub-25 4×4 single — 588 people have one; it is 4.79 away.
  • A sub-50 5×5 single — 713 people have one; it is 4.82 away.

Targets move as he improves.