| Mjafellsrom vs King | 19–25 | 43.18% |
| Mjafellsrom vs Hwoarang | 19–21 | 47.50% |
| Mjafellsrom vs Reina | 25–14 | 64.10% |
| Mjafellsrom vs Heihachi | 16–22 | 42.11% |
| Mjafellsrom vs Kazuya | 15–20 | 42.86% |
| Mjafellsrom vs Jin | 13–16 | 44.83% |
| Mjafellsrom vs Lili | 12–14 | 46.15% |
| Mjafellsrom vs Lidia | 6–16 | 27.27% |
| Mjafellsrom vs Jun | 9–11 | 45.00% |
| Mjafellsrom vs Law | 7–12 | 36.84% |
| Mjafellsrom vs Steve | 17–2 | 89.47% |
| Mjafellsrom vs Dragunov | 11–8 | 57.89% |
| Mjafellsrom vs Bryan | 12–6 | 66.67% |
| Mjafellsrom vs Yoshimitsu | 7–7 | 50.00% |
| Mjafellsrom vs Lars | 7–7 | 50.00% |
| Mjafellsrom vs Nina | 7–7 | 50.00% |
| Mjafellsrom vs Alisa | 5–7 | 41.67% |
| Mjafellsrom vs Paul | 2–9 | 18.18% |
| Mjafellsrom vs Raven | 5–6 | 45.45% |
| Mjafellsrom vs Asuka | 8–2 | 80.00% |
| Mjafellsrom vs Lee | 5–5 | 50.00% |
| Mjafellsrom vs Leroy | 4–6 | 40.00% |
| Mjafellsrom vs Azucena | 5–5 | 50.00% |
| Mjafellsrom vs Jack-8 | 0–8 | 0.00% |
| Mjafellsrom vs Feng | 4–4 | 50.00% |
| Mjafellsrom vs Zafina | 4–3 | 57.14% |
| Mjafellsrom vs Victor | 2–4 | 33.33% |
| Mjafellsrom vs Kuma | 4–1 | 80.00% |
| Mjafellsrom vs Leo | 2–2 | 50.00% |
| Mjafellsrom vs Devil Jin | 1–2 | 33.33% |
| Mjafellsrom vs Eddy | 3–0 | 100.00% |
| Mjafellsrom vs Claudio | 2–0 | 100.00% |
| Mjafellsrom vs Shaheen | 2–0 | 100.00% |
| Mjafellsrom vs Clive | 2–0 | 100.00% |
| Mjafellsrom vs Armor King | 2–0 | 100.00% |
| Mjafellsrom vs Panda | 1–0 | 100.00% |
Limitations
This data is often requested to give insight into which characters you have more trouble with than others, but it is not particularly helpful for that. The main issue is that it is heavily skewed by how strong the opponents you play are.
For example, this data suggests my worst matchup is clearly vs Reina, but that's just because most of those games are vs Yagami.
There is a way to account for this being worked on. The central idea is to assign each matchup a rating vs you which adjusts based on the result, much like the regular rating but also based on the rating of each player. With this, it would give a better summary of how well you perform vs each character.
In the meantime, this page is here to present the data as requested.