People · Australia
Kosei Otsu
Megaminx · top 78.0% of 34,786 all-time · competing since September 2022 · 2022OTSU01
Kosei Otsu has been competing for 4 years. His best event is the Megaminx: a personal-best single of 3:10.94, set at Take Your Time Sydney 2024, puts him in the top 78.0% of the 34,786 people who have ever been ranked in the event, and 1,049th in Australia. Across 10 competitions since September 2022, he has put 54 official solves on the record across three events. Solve to solve, his 3×3 times vary about 13% around a typical one, an early reading from 9 counted rounds. His 3×3 best has come down from 1:28.42 in September 2022 to 43.60, a 51% improvement. Kosei has entered ten competitions, more competitions than 92% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | Australia | |
|---|---|---|---|---|---|
| Megaminx | 3:10.94 | 3:16.86 | top 78.0% | 1,049 / 1,277 | |
| 3×3 | 43.60 | 46.72 | top 80.7% | 9,436 / 11,709 | |
| 4×4 | 2:58.68 | 3:27.23 | top 96.3% | 3,009 / 3,051 |
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
- 26 Nov 2022First sub-60 3×3: 54.17 at Northside Spring Saturday 2022.
- 4 Sep 2022First competition: Runaway Bay Sunday Challenge 2022. A 1:28.42 3×3 single to start from.
Competitions
- Take Your Time Sydney 2024 · 12 Oct 2024 — 1 personal best set
- Cubing in Corinda Sunday 2024 · 10 Mar 2024
- Tassie Summer 2024 · 13 Jan 2024
- Queensland Open 2023 · 8 Jul 2023 — 1 personal best set
- Runaway Bay May Sunday 2023 · 28 May 2023
- Brisbane Summer 2023 · 4 Feb 2023 — 1 personal best set
- Orange Zest 2023 · 8 Jan 2023 — 1 personal best set
- Rubik's WCA Oceanic Championship 2022 · 15 Dec 2022 — 1 personal best set
- Northside Spring Saturday 2022 · 26 Nov 2022 — 1 personal best set
- Runaway Bay Sunday Challenge 2022 · 4 Sep 2022
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.
- Jamie Otsu — met in 11 rounds, never finished ahead
- Lucas Otsu — met in 10 rounds, never finished ahead
- David McLean — met in 7 rounds, never finished ahead
Next targets
- A sub-3:00 Megaminx single — 25,853 people have one; it is 10.94 away.
- A sub-40 3×3 single — 218,634 people have one; it is 3.60 away.
Targets move as he improves.