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The Middle Three
People → China → Haichuan Du (杜海川)

People · China

Haichuan Du (杜海川)

2×2 · top 0.75% of 186,767 all-time · competing since December 2011 · 2011DUHA01

Haichuan Du (杜海川) has been competing for 15 years. His best event is the 2×2: a personal-best single of 1.09, set at Zhenjiang Open 2017, puts him in the top 0.75% of the 186,767 people who have ever been ranked in the event, and 77th in China. Until November 2008, no official 2×2 solve in the world had been that fast. Across 30 competitions since December 2011, he has put 1,103 official solves on the record across eight events. Solve to solve, his 3×3 times vary about 12% around a typical one, steadier than 76% of the 35,811 competitors with ten or more counted rounds. His 3×3 best has come down from 31.13 in December 2011 to 7.37, a 76% improvement. Haichuan has entered 30 competitions, more competitions than 98% of everyone who has ever competed.

2×2
best event — top 0.75% of 186,767 all-time
1.09
signature single · Zhenjiang Open 2017
1,103
official solves on the record
12%
solve-to-solve spread · steadier than 76% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingChina
2×21.092.61
top 0.75%77 / 15,796
3×37.379.03
top 1.8%639 / 28,153
3×3 one-handed13.3215.73
top 4.9%447 / 5,922
4×434.9937.42
top 6.7%672 / 5,926
Pyraminx4.757.40
top 11.7%1,397 / 10,224
Clock9.3214.19
top 21.6%470 / 1,843
3×3 Fewest Moves33 moves39.67
top 23.4%244 / 1,058
5×51:25.541:29.33
top 23.7%1,125 / 2,816

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

Shanghai Snowball Winter 2011: 31.13Shanghai Summer 2012: 22.08Shanghai Maritime Open 2013: 14.93Shanghai Summer 2013: 13.15Shanghai Spring 2014: 11.80Suzhou Open 2014: 11.77Nantong Open 2014: 12.90Cube Elite Union Cafe 2014: 10.71Shanghai Fudan Spring 2015: 9.29Nanjing Spring 2015: 10.38Hefei Open 2015: 10.20Wuxi Open 2015: 10.31Shanghai Summer Open 2015: 9.85China Championship 2015: 9.55Shanghai Spring 2016: 8.34Shanghai Songjiang Open 2016: 9.61Suzhou Open 2016: 8.15Hefei Open 2016: 8.94ZUST Open 2017: 8.62China Championship 2017: 8.57Wuxi Open 2017: 9.30Yangzhou Open 2017: 9.23Nanjing Autumn 2017: 9.05Zhenjiang Open 2017: 8.86Shanghai Winter 2018: 7.56Wuxi Autumn 2018: 8.06Guildford Open 2020: 7.37Kunshan Afternoon 2021: 7.93Lishui Open 2025: 8.817.3731.1324 Dec 201125 May 2025

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-1 2×2 single — 1,032 people have one; it is 0.09 away.
  • A sub-6 3×3 single — 1,376 people have one; it is 1.37 away.

Targets move as he improves.