Head to head
Mark Boyanowski vs Simon Kellum
Two careers, 213 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.
Mark Boyanowski (United States) and Simon Kellum (United States) have met in 213 rounds across 27 competitions since 2016. Counting every round where both finished with a result, Simon Kellum leads Mark Boyanowski: 112 finishes in front to 100 and 1 tie.
On personal bests the split is just as plain: across 17 shared events, Simon Kellum holds the faster single in 12, Mark Boyanowski in 5.
Personal bests, side by side
faster single in bold| Event | Mark Boyanowski single | average | Simon Kellum single | average |
|---|---|---|---|---|
| 3×3 | 8.93 | 10.74 | 4.91 | 7.06 |
| 2×2 | 2.47 | 3.77 | 0.71 | 1.44 |
| 4×4 | 37.30 | 43.53 | 29.24 | 35.27 |
| 5×5 | 1:09.93 | 1:17.55 | 55.69 | 1:04.66 |
| 6×6 | 2:03.56 | 2:15.24 | 1:53.03 | 2:06.17 |
| 7×7 | 3:01.70 | 3:07.96 | 2:57.72 | 3:15.06 |
| 3×3 blindfolded | 21.48 | 27.23 | 39.08 | 1:02.97 |
| 3×3 Fewest Moves | 17 moves | 22.33 | 19 moves | 20.67 |
| 3×3 one-handed | 14.44 | 19.98 | 8.49 | 11.90 |
| Clock | 15.76 | 19.64 | 4.00 | 4.88 |
| Megaminx | 1:00.69 | 1:10.03 | 39.37 | 45.94 |
| Pyraminx | 3.10 | 6.11 | 0.73 | 1.53 |
| Skewb | 4.28 | 7.75 | 0.85 | 1.71 |
| Square-1 | 16.55 | 24.94 | 6.65 | 10.13 |
| 4×4 blindfolded | 2:50.79 | 3:00.65 | 7:34.34 | — |
| 5×5 blindfolded | 5:33.60 | 6:44.31 | 19:52.00 | — |
| 3×3 Multi-Blind | 47 of 50 cubes · 54:18 | — | 10 of 12 cubes · 56:45 | — |
Year by year
every meeting, 213 rounds in allRecent meetings
newest first · averages where the round ranked on one, singles otherwise| Year | Competition | Event | Round | Mark Boyanowski | Simon Kellum | ahead |
|---|---|---|---|---|---|---|
| 2026 | Rubik's WCA North American Championship 2026 | 3×3 | First round | 12.46 | 8.63 | Simon Kellum |
| 2026 | Rubik's WCA North American Championship 2026 | 3×3 blindfolded | Second round | 29.92 | 1:27.86 | Mark Boyanowski |
| 2026 | Rubik's WCA North American Championship 2026 | 3×3 blindfolded | First round | 31.68 | 1:05.08 | Mark Boyanowski |
| 2026 | Rubik's WCA North American Championship 2026 | 3×3 Fewest Moves | Final | 24.67 | 23 moves | Mark Boyanowski |
| 2026 | Rubik's WCA North American Championship 2026 | 4×4 | First round | 50.29 | 36.71 | Simon Kellum |
| 2025 | Rubik's WCA World Championship 2025 | 2×2 | First round | 4.79 | 2.95 | Simon Kellum |
| 2025 | Rubik's WCA World Championship 2025 | 3×3 | First round | 11.88 | 9.81 | Simon Kellum |
| 2025 | Rubik's WCA World Championship 2025 | 3×3 blindfolded | First round | 29.51 | — | Mark Boyanowski |
| 2025 | Rubik's WCA World Championship 2025 | 3×3 Fewest Moves | Final | 25 moves | 23 moves | Simon Kellum |
| 2025 | Rubik's WCA World Championship 2025 | 3×3 one-handed | First round | 22.12 | 13.76 | Simon Kellum |
| 2025 | Rubik's WCA World Championship 2025 | 4×4 | First round | 45.42 | 37.70 | Simon Kellum |
| 2025 | Rubik's WCA World Championship 2025 | 5×5 | First round | 1:13.49 | 1:09.99 | Simon Kellum |
| 2025 | Rubik's WCA World Championship 2025 | 6×6 | First round | 2:16.76 | 2:12.40 | Simon Kellum |
| 2025 | Rubik's WCA World Championship 2025 | 7×7 | First round | 3:15.66 | 3:32.85 | Mark Boyanowski |
Full careers: Mark Boyanowski · Simon Kellum. 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.