People · Brazil
Samuel Katsuo Yamamoto Amaral
Skewb · top 5.9% of 74,164 all-time · competing since November 2023 · 2023AMAR10
Samuel Katsuo Yamamoto Amaral has been competing for 3 years. His best event is the Skewb: a personal-best single of 3.17, set at Campeonato Brasileiro de Cubo Mágico 2024, puts him in the top 5.9% of the 74,164 people who have ever been ranked in the event, and 69th in Brazil. Until February 2014, no official Skewb solve in the world had been that fast. Across 4 competitions since November 2023, he has put 255 official solves on the record across ten events. Solve to solve, his 3×3 times vary about 16% around a typical one, an early reading from 7 counted rounds. His Skewb best has come down from 8.93 in November 2023 to 3.17, a 65% improvement. Samuel has entered four competitions, more competitions than 78% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | Brazil | |
|---|---|---|---|---|---|
| Skewb | 3.17 | 6.08 | top 5.9% | 69 / 1,493 | |
| 3×3 | 10.18 | 12.64 | top 8.0% | 415 / 9,942 | |
| Pyraminx | 5.12 | 8.53 | top 13.9% | 341 / 3,311 | |
| 3×3 one-handed | 20.60 | 22.33 | top 22.2% | 325 / 2,045 | |
| 4×4 | 49.27 | 57.07 | top 23.9% | 320 / 1,884 | |
| Square-1 | 18.70 | 26.74 | top 25.1% | 135 / 656 | |
| 2×2 | 4.25 | 4.57 | top 29.8% | 1,125 / 5,285 | |
| 5×5 | 1:36.11 | 2:03.51 | top 32.4% | 182 / 855 | |
| Megaminx | 1:49.51 | 1:56.83 | top 40.2% | 339 / 1,082 | |
| Clock | 13.58 | 16.22 | top 42.1% | 289 / 741 |
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, Skewb. Faster is higher — the axis is the right way up.
The story so far
- 26 Sep 2026Eight personal bests in one day at Center Shopping Jacarepaguá Open 2026.
- 19 Sep 2026Ten personal bests in one day at Rio Exxcube Open 2026.
- 15 Nov 2024First sub-20 3×3: 14.11 at Campeonato Brasileiro de Cubo Mágico 2024.
- 15 Nov 2024First sub-15 3×3: 14.11 at Campeonato Brasileiro de Cubo Mágico 2024.
- 15 Nov 2024Nine personal bests in one day at Campeonato Brasileiro de Cubo Mágico 2024.
- 11 Nov 2023First competition: Faria Brito 2023. A 24.59 3×3 single to start from.
Competitions
- Center Shopping Jacarepaguá Open 2026 · 26 Sep 2026 — 8 personal bests set
- Rio Exxcube Open 2026 · 19 Sep 2026 — 10 personal bests set
- Campeonato Brasileiro de Cubo Mágico 2024 · 15 Nov 2024 — 9 personal bests set
- Faria Brito 2023 · 11 Nov 2023
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.
- Gabriel Sargeiro Gomes de Mello — met in 51 rounds, finished ahead 13 times
- Mariana Castro Gonçalves — met in 48 rounds, finished ahead 11 times
- Pedro Henrique Maciel Ceccopieri Belo (陈昊然) — met in 47 rounds, finished ahead 8 times
Next targets
- A sub-3 Skewb single — 3,709 people have one; it is 0.17 away.
- A sub-10 3×3 single — 21,606 people have one; it is 0.18 away.
Targets move as he improves.