Sunday 6 September 2026 Rebuilt nightly from the WCA's official results · export of 6 September 2026 · About
The Middle Three
People → Japan → John Chiba Seiko (千叶成弘)

People · Japan

John Chiba Seiko (千叶成弘)

Skewb · top 26.7% of 73,281 all-time · competing since May 2016 · 2016SEIK01

John Chiba Seiko (千叶成弘) has been competing for 10 years. His best event is the Skewb: a personal-best single of 6.13, set at Chengdu Open 2016, puts him in the top 26.7% of the 73,281 people who have ever been ranked in the event, and 134th in Japan. Across 1 competition since May 2016, he has put 10 official solves on the record across one event.

Skewb
best event — top 26.7% of 73,281 all-time
6.13
signature single · Chengdu Open 2016
10
official solves on the record

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingJapan
Skewb6.139.58
top 26.7%134 / 338

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 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.

Next targets

  • A sub-6 Skewb single — 18,841 people have one; it is 0.13 away.

Targets move as he improves.