People · United States
Sebastian Y. Ko
3×3 · top 20.2% of 284,439 all-time · competing since October 2024 · 2024KOSE02
Sebastian Y. Ko has been competing for a year. His best event is the 3×3: a personal-best single of 13.77, set at NxN Nonsense NC 2026, puts him in the top 20.2% of the 284,439 people who have ever been ranked in the event, and 10,852nd in the United States. Across 5 competitions since October 2024, he has put 88 official solves on the record across four events. Solve to solve, his 3×3 times vary about 14% around a typical one, an early reading from 8 counted rounds. His 3×3 best has come down from 22.42 in October 2024 to 13.77, a 39% improvement. Sebastian has entered five competitions, more competitions than 83% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | United States | |
|---|---|---|---|---|---|
| 3×3 | 13.77 | 16.52 | top 20.2% | 10,852 / 59,724 | |
| 2×2 | 4.68 | 5.86 | top 35.2% | 14,057 / 40,951 | |
| Pyraminx | 8.36 | 9.51 | top 39.3% | 11,241 / 28,708 | |
| 4×4 | 1:18.91 | 1:30.34 | top 55.0% | 9,401 / 19,072 |
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
- 19 Oct 2025First sub-15 3×3: 14.34 at NCSU Wolfpack 2025.
- 13 Jun 2025First sub-20 3×3: 19.13 at CubingUSA Southeast Championship 2025.
- 12 Oct 2024First competition: CubingUSA Mid-Atlantic Championship 2024. A 25.28 3×3 single to start from.
Competitions
- Rubik's WCA North American Championship 2026 · 2 Jul 2026
- NxN Nonsense NC 2026 · 22 Feb 2026 — 1 personal best set
- NCSU Wolfpack 2025 · 19 Oct 2025 — 2 personal bests set
- CubingUSA Southeast Championship 2025 · 13 Jun 2025 — 2 personal bests set
- CubingUSA Mid-Atlantic Championship 2024 · 12 Oct 2024 — 1 personal best set
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.
- Kathryn Zavadil — met in 18 rounds, finished ahead 13 times
- Quinn Anderson — met in 18 rounds, never finished ahead
- Logan McClure — met in 17 rounds, finished ahead 3 times
Next targets
- A sub-12 3×3 single — 39,535 people have one; it is 1.77 away.
- A sub-4 2×2 single — 49,452 people have one; it is 0.68 away.
Targets move as he improves.