Sunday 6 September 2026 Rebuilt nightly from the WCA's official results · export of 6 September 2026 · About
The Middle Three
People → China → Mengen Sima (司马蒙恩)

People · China

Mengen Sima (司马蒙恩)

3×3 · top 35.7% of 284,439 all-time · competing since June 2019 · 2019SIMA03

Mengen Sima (司马蒙恩) has been competing for 7 years. His best event is the 3×3: a personal-best single of 18.53, set at Shandong Open 2019, puts him in the top 35.7% of the 284,439 people who have ever been ranked in the event, and 12,657th in China. Across 3 competitions since June 2019, he has put 41 official solves on the record across five events. His 3×3 best has come down from 24.08 in June 2019 to 18.53, a 23% improvement. Mengen has entered three competitions, more competitions than 69% of everyone who has ever competed.

3×3
best event — top 35.7% of 284,439 all-time
18.53
signature single · Shandong Open 2019
41
official solves on the record

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingChina
3×318.5319.85
top 35.7%12,657 / 28,153
2×24.956.06
top 38.7%6,684 / 15,796
4×41:06.76
top 43.7%4,121 / 5,926
5×52:25.05
early days — 2 solves2,448 / 2,816
Skewb16.7919.05
top 83.5%4,215 / 5,004

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

Hefei Summer 2019: 24.08Heze Open 2019: 21.60Shandong Open 2019: 18.5318.5324.0822 Jun 20194 Oct 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 his.

Next targets

  • A sub-15 3×3 single — 69,493 people have one; it is 3.53 away.
  • A sub-4 2×2 single — 49,452 people have one; it is 0.95 away.

Targets move as he improves.