In the past year (2025), Jack Amster competed in 4 competitions and 22 rounds across 7 events, from Feb 22nd to Aug 24th.
Solves/Attempts
He attempted 98 solves and completed 97.
| Event | Solves | Attempts |
| 3x3x3 Cube | 45 | 45 |
| 2x2x2 Cube | 25 | 25 |
| Pyraminx | 10 | 10 |
| Square-1 | 5 | 5 |
| 4x4x4 Cube | 4 | 4 |
| Clock | 4 | 4 |
| Skewb | 4 | 5 |
Personal Bests
He broke his personal best 17 times across 7 events, including 8 singles and 9 averages.
| Event | Times | Single | Average |
| 3x3x3 Cube | 5 | 2 | 3 |
| 2x2x2 Cube | 3 | 0 | 3 |
| Clock | 2 | 2 | 0 |
| Pyraminx | 2 | 1 | 1 |
| Skewb | 2 | 1 | 1 |
| Square-1 | 2 | 1 | 1 |
| 4x4x4 Cube | 1 | 1 | 0 |
Improvements of Single
| Event | ≤2024 | 2025 | Improvement |
| Skewb | 28.38 | 14.79 | 13.59 (91.89%) |
| 3x3x3 Cube | 22.69 | 13.71 | 8.98 (65.50%) |
| Pyraminx | 8.89 | 8.79 | 0.10 (1.14%) |
| Clock | - | 40.14 | - |
| Square-1 | - | 54.97 | - |
| 4x4x4 Cube | - | 1:26.69 | - |
Improvements of Average
| Event | ≤2024 | 2025 | Improvement |
| Skewb | 31.73 | 20.09 | 11.64 (57.94%) |
| 2x2x2 Cube | 8.02 | 5.52 | 2.50 (45.29%) |
| 3x3x3 Cube | 24.10 | 17.71 | 6.39 (36.08%) |
| Pyraminx | 16.37 | 14.59 | 1.78 (12.20%) |
| Square-1 | - | 1:10.47 | - |
Cubers
He met 260 cubers from 7 countries/regions, 95 of whom competed with him more than once.
| Shared Competitions | Competitors |
| 1 | 165 |
| 2 | 53 |
| 3 | 30 |
| 4 | 12 |
| All | 260 |
Regions
He competed in 1 country/region.
