Head to head
Rasmus Stub Detlefsen vs Simon Kellum
Two careers, 69 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.
Rasmus Stub Detlefsen (Denmark) and Simon Kellum (United States) have met in 69 rounds across 5 competitions since 2019. Counting every round where both finished with a result, Rasmus Stub Detlefsen leads Simon Kellum: 38 finishes in front to 30 and 1 tie.
On personal bests the split is just as plain: across 15 shared events, Simon Kellum holds the faster single in 9, Rasmus Stub Detlefsen in 6.
Personal bests, side by side
faster single in bold| Event | Rasmus Stub Detlefsen single | average | Simon Kellum single | average |
|---|---|---|---|---|
| 3×3 | 5.03 | 6.46 | 4.91 | 7.06 |
| 2×2 | 0.69 | 1.37 | 0.71 | 1.44 |
| 4×4 | 23.06 | 26.45 | 29.24 | 35.27 |
| 5×5 | 50.18 | 56.78 | 55.69 | 1:04.66 |
| 6×6 | 1:36.11 | 1:45.67 | 1:53.03 | 2:06.17 |
| 7×7 | 2:40.27 | 2:45.85 | 2:57.72 | 3:15.06 |
| 3×3 blindfolded | 1:29.42 | 2:07.31 | 39.08 | 1:02.97 |
| 3×3 Fewest Moves | 28 moves | 30.33 | 19 moves | 20.67 |
| 3×3 one-handed | 9.34 | 12.50 | 8.49 | 11.90 |
| Clock | 6.54 | 7.59 | 4.00 | 4.88 |
| Megaminx | 46.64 | 54.18 | 39.37 | 45.94 |
| Pyraminx | 1.15 | 2.52 | 0.73 | 1.53 |
| Skewb | 1.17 | 2.24 | 0.85 | 1.71 |
| Square-1 | 3.70 | 5.46 | 6.65 | 10.13 |
| 3×3 Multi-Blind | 2 of 2 cubes · 12:24 | — | 10 of 12 cubes · 56:45 | — |
Year by year
every meeting, 69 rounds in allRecent meetings
newest first · averages where the round ranked on one, singles otherwise| Year | Competition | Event | Round | Rasmus Stub Detlefsen | Simon Kellum | ahead |
|---|---|---|---|---|---|---|
| 2025 | Rubik's WCA World Championship 2025 | 2×2 | First round | 1.82 | 2.95 | Rasmus Stub Detlefsen |
| 2025 | Rubik's WCA World Championship 2025 | 3×3 | First round | 7.20 | 9.81 | Rasmus Stub Detlefsen |
| 2025 | Rubik's WCA World Championship 2025 | 3×3 blindfolded | First round | 1:58.37 | — | Rasmus Stub Detlefsen |
| 2025 | Rubik's WCA World Championship 2025 | 3×3 one-handed | First round | 16.00 | 13.76 | Simon Kellum |
| 2025 | Rubik's WCA World Championship 2025 | 4×4 | First round | 35.30 | 37.70 | Rasmus Stub Detlefsen |
| 2025 | Rubik's WCA World Championship 2025 | 5×5 | First round | 1:03.84 | 1:09.99 | Rasmus Stub Detlefsen |
| 2025 | Rubik's WCA World Championship 2025 | 6×6 | First round | 1:55.81 | 2:12.40 | Rasmus Stub Detlefsen |
| 2025 | Rubik's WCA World Championship 2025 | 7×7 | First round | 3:20.63 | 3:32.85 | Rasmus Stub Detlefsen |
| 2025 | Rubik's WCA World Championship 2025 | Clock | First round | 8.83 | 7.80 | Simon Kellum |
| 2025 | Rubik's WCA World Championship 2025 | Megaminx | First round | 1:07.00 | 53.49 | Simon Kellum |
| 2025 | Rubik's WCA World Championship 2025 | Pyraminx | First round | 3.05 | 2.14 | Simon Kellum |
| 2025 | Rubik's WCA World Championship 2025 | Pyraminx | Second round | 2.52 | 1.90 | Simon Kellum |
| 2025 | Rubik's WCA World Championship 2025 | Skewb | Second round | 4.83 | 4.07 | Simon Kellum |
| 2025 | Rubik's WCA World Championship 2025 | Skewb | First round | 4.34 | 2.81 | Simon Kellum |
Full careers: Rasmus Stub Detlefsen · 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.