Head to head
Jack Pfeifer vs Alexei Sinyavin
Two careers, 91 shared rounds, one running count. Everything below comes from the official results the two of them posted in the same rounds of the same competitions.
Jack Pfeifer (United States) and Alexei Sinyavin (United States) have met in 91 rounds across 7 competitions since 2019. Counting every round where both finished with a result, Jack Pfeifer leads Alexei Sinyavin: 67 finishes in front to 24.
On personal bests the split is just as plain: across 16 shared events, Jack Pfeifer holds the faster single in 14, Alexei Sinyavin in 2.
Personal bests, side by side
faster single in bold| Event | Jack Pfeifer single | average | Alexei Sinyavin single | average |
|---|---|---|---|---|
| 3×3 | 4.84 | 6.15 | 5.61 | 7.00 |
| 2×2 | 0.63 | 1.48 | 1.14 | 1.86 |
| 4×4 | 21.17 | 24.50 | 22.12 | 25.11 |
| 5×5 | 38.13 | 42.47 | 41.32 | 46.51 |
| 6×6 | 1:08.61 | 1:12.44 | 1:15.66 | 1:20.66 |
| 7×7 | 1:41.75 | 1:46.70 | 2:03.71 | 2:13.89 |
| 3×3 blindfolded | 29.52 | 37.46 | 1:15.03 | — |
| 3×3 Fewest Moves | 23 moves | 27.00 | 19 moves | 22.00 |
| 3×3 one-handed | 8.10 | 9.97 | 11.33 | 13.67 |
| Clock | 4.81 | 6.20 | 5.78 | 6.96 |
| Megaminx | 36.72 | 41.15 | 24.60 | 27.92 |
| Pyraminx | 1.59 | 2.66 | 3.47 | 5.15 |
| Skewb | 1.52 | 2.92 | 1.57 | 4.29 |
| Square-1 | 5.16 | 7.61 | 7.02 | 10.21 |
| 4×4 blindfolded | 6:47.82 | 7:57.64 | 18:55.00 | — |
| 3×3 Multi-Blind | 8 of 9 cubes · 52:39 | — | 4 of 6 cubes · 46:30 | — |
Year by year
every meeting, 91 rounds in allRecent meetings
newest first · averages where the round ranked on one, singles otherwise| Year | Competition | Event | Round | Jack Pfeifer | Alexei Sinyavin | ahead |
|---|---|---|---|---|---|---|
| 2026 | Rubik's WCA North American Championship 2026 | 2×2 | First round | 1.97 | 2.92 | Jack Pfeifer |
| 2026 | Rubik's WCA North American Championship 2026 | 3×3 | Second round | 6.42 | 8.72 | Jack Pfeifer |
| 2026 | Rubik's WCA North American Championship 2026 | 3×3 | First round | 7.30 | 7.62 | Jack Pfeifer |
| 2026 | Rubik's WCA North American Championship 2026 | 3×3 one-handed | First round | 12.11 | 15.73 | Jack Pfeifer |
| 2026 | Rubik's WCA North American Championship 2026 | 4×4 | Second round | 28.37 | 28.29 | Alexei Sinyavin |
| 2026 | Rubik's WCA North American Championship 2026 | 4×4 | First round | 26.91 | 28.38 | Jack Pfeifer |
| 2026 | Rubik's WCA North American Championship 2026 | 5×5 | Second round | 44.35 | 48.63 | Jack Pfeifer |
| 2026 | Rubik's WCA North American Championship 2026 | 5×5 | First round | 45.28 | 50.93 | Jack Pfeifer |
| 2026 | Rubik's WCA North American Championship 2026 | 5×5 | Final | 46.41 | 47.78 | Jack Pfeifer |
| 2026 | Rubik's WCA North American Championship 2026 | 6×6 | First round | 1:20.02 | 1:31.36 | Jack Pfeifer |
| 2026 | Rubik's WCA North American Championship 2026 | 6×6 | Final | 1:20.38 | 1:34.40 | Jack Pfeifer |
| 2026 | Rubik's WCA North American Championship 2026 | 7×7 | Final | 2:00.55 | 2:27.29 | Jack Pfeifer |
| 2026 | Rubik's WCA North American Championship 2026 | 7×7 | First round | 1:57.58 | 2:17.62 | Jack Pfeifer |
| 2026 | Rubik's WCA North American Championship 2026 | Megaminx | First round | 43.25 | 31.05 | Alexei Sinyavin |
Full careers: Jack Pfeifer · Alexei Sinyavin. A meeting is a round of one event at one competition where both finished with a counted result. Who finished ahead follows official placing in the round: rounds played to an average are won on the average, best-of rounds on the single.