People · Japan
Kosei Tsuda
3×3 · top 8.0% of 288,433 all-time · competing since November 2022 · 2022TSUD01
Kosei Tsuda has been competing for 4 years. His best event is the 3×3: a personal-best single of 10.18, set at Lucky Lynnwood 2023, puts him in the top 8.0% of the 288,433 people who have ever been ranked in the event, and 350th in Japan. Until May 2007, no official 3×3 solve in the world had been that fast. Across 10 competitions since November 2022, he has put 161 official solves on the record across six events. Solve to solve, his 3×3 times vary about 13% around a typical one, steadier than 52% of the 36,406 competitors with ten or more counted rounds. His 3×3 best has come down from 18.20 in November 2022 to 10.18, a 44% 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 | Japan | |
|---|---|---|---|---|---|
| 3×3 | 10.18 | 15.88 | top 8.0% | 350 / 3,360 | |
| 2×2 | 3.03 | 4.48 | top 14.6% | 194 / 1,026 | |
| Pyraminx | 5.40 | 7.25 | top 15.8% | 182 / 691 | |
| Skewb | 5.86 | 9.43 | top 24.7% | 135 / 354 | |
| Megaminx | 1:56.73 | 2:12.18 | top 44.1% | 215 / 313 | |
| 5×5 | 3:01.99 | — | early days — 2 solves | 369 / 426 |
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
- 8 Jul 2023First sub-15 3×3: 14.01 at Bothell Summer 2023.
- 26 Nov 2022First competition: Oakville Fall A 2022. A 18.20 3×3 single to start from.
Competitions
- CubingUSA Northwest Championship 2024 · 28 Jun 2024 — 1 personal best set
- Husky Pride Seattle 2024 · 15 Jun 2024
- Kenmore Mini B 2024 · 17 Feb 2024 — 1 personal best set
- Lucky Lynnwood 2023 · 30 Sep 2023 — 1 personal best set
- Kent Summer 2023 · 9 Sep 2023
- Maltby Mega Special 2023 · 9 Jul 2023
- Bothell Summer 2023 · 8 Jul 2023 — 1 personal best set
- Waterloo Favourites A 2023 · 18 Feb 2023 — 2 personal bests set
- Appleby Winter A 2023 · 7 Jan 2023
- Oakville Fall A 2022 · 26 Nov 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.
- Max Siauw — met in 23 rounds, never finished ahead
- Mihir A. Rai — met in 22 rounds, never finished ahead
- Sameer Aggarwal — met in 20 rounds, never finished ahead
Next targets
- A sub-10 3×3 single — 21,606 people have one; it is 0.18 away.
- A sub-3 2×2 single — 27,049 people have one; it is 0.03 away.
Targets move as he improves.