People · China

Duo Zheng (郑铎)

3×3 one-handed · top 4.3% of 73,695 all-time · competing since May 2018 · 2018DUOZ01

Duo Zheng (郑铎) has been competing for 8 years. His best event is the 3×3 one-handed: a personal-best single of 12.91, set at Side Events Minnesota 2022, puts him in the top 4.3% of the 73,695 people who have ever been ranked in the event, and 378th in China. Until January 2010, no official 3×3 one-handed solve in the world had been that fast. Across 10 competitions since May 2018, he has put 281 official solves on the record across 16 events. Solve to solve, his 3×3 times vary about 12% around a typical one, steadier than 63% of the 35,811 competitors with ten or more counted rounds. His 3×3 best has come down from 20.17 in May 2018 to 9.05, a 55% improvement. Duo has entered ten competitions, more competitions than 92% of everyone who has ever competed.

3×3 one-handed

best event — top 4.3% of 73,695 all-time

12.91

signature single · Side Events Minnesota 2022

281

official solves on the record

12%

solve-to-solve spread · steadier than 63% of the field

Standing, event by event

vs everyone ever ranked

Event	PB single	PB average		China
3×3 one-handed	12.91	19.06	top 4.3%	378 / 5,922
3×3	9.05	10.97	top 5.0%	1,895 / 28,153
7×7	2:42.27	2:52.97	top 6.0%	122 / 1,261
6×6	1:56.97	2:08.91	top 9.8%	212 / 1,349
5×5	1:13.32	1:17.97	top 14.1%	687 / 2,816
2×2	3.07	4.77	top 15.1%	2,390 / 15,796
Clock	8.89	10.08	top 19.4%	429 / 1,843
Pyraminx	6.11	9.98	top 20.8%	2,379 / 10,224
4×4	51.98	1:01.60	top 27.1%	2,856 / 5,926
3×3 blindfolded	1:55.39	2:20.20	top 31.9%	454 / 1,183
Megaminx	1:46.41	2:00.31	top 38.4%	1,116 / 1,678
Skewb	7.98	11.94	top 41.1%	2,430 / 5,004
Square-1	30.25	47.38	top 49.8%	860 / 1,362
4×4 blindfolded	12:04.00	—	early days — 2 solves	111 / 149
3×3 Fewest Moves	47 moves	51.33	top 71.5%	837 / 1,058
3×3 Multi-Blind	6 of 10 cubes · 51:10	—	early days — 1 solve	222 / 278

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

25 Sep 2022Three personal bests in one day at 7x7 in a Madison Park 2022.
20 Aug 2022Four personal bests in one day at Side Events Minnesota 2022.
14 Aug 2022Five personal bests in one day at DFW Cubing Summer 2022.
22 Feb 2020First sub-10 3×3: 9.98 at Michigan Cubing Club Alpha 2020.
22 Feb 2020Four personal bests in one day at Michigan Cubing Club Alpha 2020.
21 Dec 2019Seven personal bests in one day at Shaoxing Open 2019.

Competitions

7x7 in a Madison Park 2022 · 25 Sep 2022 — 3 personal bests set
Mental Breakdown Minnesota 2022 · 21 Aug 2022 — 1 personal best set
Side Events Minnesota 2022 · 20 Aug 2022 — 4 personal bests set
DFW Cubing Summer 2022 · 14 Aug 2022 — 5 personal bests set
Michigan Cubing Club Alpha 2020 · 22 Feb 2020 — 4 personal bests set
Shaoxing Open 2019 · 21 Dec 2019 — 7 personal bests set
Wuxi Open 2019 · 10 Aug 2019 — 2 personal bests set
Beijing Winter 2018 · 31 Dec 2018 — 3 personal bests set
Tangshan Open 2018 · 17 Jun 2018 — 1 personal best set
CubingUSA Great Lakes Championship 2018 · 18 May 2018

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.

Kate Grahame — met in 26 rounds, finished ahead 9 times
Carter Kucala — met in 25 rounds, finished ahead 5 times
Daniel Mullen — met in 23 rounds, finished ahead 6 times

Next targets

A sub-12 3×3 one-handed single — 2,187 people have one; it is 0.91 away.
A sub-8 3×3 single — 7,931 people have one; it is 1.05 away.

Targets move as he improves.