| Heiðinn vs Reina | 14–16 | 46.67% |
| Heiðinn vs Heihachi | 10–14 | 41.67% |
| Heiðinn vs Steve | 10–11 | 47.62% |
| Heiðinn vs Jin | 8–9 | 47.06% |
| Heiðinn vs King | 4–10 | 28.57% |
| Heiðinn vs Bryan | 3–10 | 23.08% |
| Heiðinn vs Kazuya | 9–4 | 69.23% |
| Heiðinn vs Leo | 3–10 | 23.08% |
| Heiðinn vs Kuma | 6–6 | 50.00% |
| Heiðinn vs Yoshimitsu | 4–6 | 40.00% |
| Heiðinn vs Hwoarang | 2–8 | 20.00% |
| Heiðinn vs Eddy | 2–7 | 22.22% |
| Heiðinn vs Law | 2–5 | 28.57% |
| Heiðinn vs Devil Jin | 3–4 | 42.86% |
| Heiðinn vs Dragunov | 4–2 | 66.67% |
| Heiðinn vs Azucena | 1–4 | 20.00% |
| Heiðinn vs Xiaoyu | 0–4 | 0.00% |
| Heiðinn vs Jun | 0–4 | 0.00% |
| Heiðinn vs Raven | 2–2 | 50.00% |
| Heiðinn vs Lidia | 2–2 | 50.00% |
| Heiðinn vs Paul | 3–0 | 100.00% |
| Heiðinn vs Jack-8 | 3–0 | 100.00% |
| Heiðinn vs Lars | 1–2 | 33.33% |
| Heiðinn vs Alisa | 1–2 | 33.33% |
| Heiðinn vs Zafina | 0–3 | 0.00% |
| Heiðinn vs Victor | 2–1 | 66.67% |
| Heiðinn vs Asuka | 0–2 | 0.00% |
| Heiðinn vs Claudio | 0–2 | 0.00% |
| Heiðinn vs Leroy | 2–0 | 100.00% |
| Heiðinn vs Nina | 1–0 | 100.00% |
| Heiðinn vs Lee | 0–1 | 0.00% |
| Heiðinn vs Clive | 0–1 | 0.00% |
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.