People · United States
Jarrett Kastenberg
2×2 · top 17.4% of 186,767 all-time · competing since September 2023 · 2023KAST05
Jarrett Kastenberg has been competing for 3 years. His best event is the 2×2: a personal-best single of 3.27, set at Princeton Fall 2023, puts him in the top 17.4% of the 186,767 people who have ever been ranked in the event, and 6,822nd in the United States. Across 5 competitions since September 2023, he has put 91 official solves on the record across six events. Solve to solve, his 3×3 times vary about 18% around a typical one, an early reading from 6 counted rounds. His 2×2 best has come down from 5.41 in September 2023 to 3.27, a 40% improvement. Jarrett 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 | |
|---|---|---|---|---|---|
| 2×2 | 3.27 | 4.80 | top 17.4% | 6,822 / 40,951 | |
| 3×3 | 13.47 | 18.53 | top 19.1% | 10,266 / 59,724 | |
| Pyraminx | 6.32 | 7.55 | top 22.4% | 6,030 / 28,708 | |
| Clock | 14.52 | 16.10 | top 46.0% | 3,709 / 8,927 | |
| 4×4 | 1:10.11 | 1:23.68 | top 47.0% | 7,820 / 19,072 | |
| 3×3 one-handed | 1:20.74 | — | early days — 2 solves | 14,274 / 15,683 |
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, 2×2. Faster is higher — the axis is the right way up.
The story so far
- 5 Apr 2026First sub-15 3×3: 13.47 at NYU Spring 2026.
- 2 Sep 2023First competition: Pretzel Mania Summer 2023. A 17.69 3×3 single to start from.
Competitions
- NYU Spring 2026 · 5 Apr 2026 — 1 personal best set
- Lodi Solves Spring 2026 · 7 Mar 2026
- American Dream NJ 2025 · 4 May 2025 — 2 personal bests set
- Princeton Fall 2023 · 18 Nov 2023 — 2 personal bests set
- Pretzel Mania Summer 2023 · 2 Sep 2023 — 2 personal bests 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.
- Ernie Pulchny — met in 17 rounds, never finished ahead
- Nico Ozsvath — met in 16 rounds, finished ahead once
- Carson Widjaja — met in 16 rounds, never finished ahead
Next targets
- A sub-3 2×2 single — 26,570 people have one; it is 0.27 away.
- A sub-12 3×3 single — 39,535 people have one; it is 1.47 away.
Targets move as he improves.