| KSM66 vs Jin | 34–44 | 43.59% |
| KSM66 vs Bryan | 28–23 | 54.90% |
| KSM66 vs Kazuya | 30–21 | 58.82% |
| KSM66 vs Reina | 25–20 | 55.56% |
| KSM66 vs Eddy | 15–25 | 37.50% |
| KSM66 vs Hwoarang | 18–21 | 46.15% |
| KSM66 vs Paul | 17–15 | 53.12% |
| KSM66 vs King | 15–16 | 48.39% |
| KSM66 vs Law | 8–14 | 36.36% |
| KSM66 vs Asuka | 14–8 | 63.64% |
| KSM66 vs Yoshimitsu | 8–13 | 38.10% |
| KSM66 vs Steve | 8–13 | 38.10% |
| KSM66 vs Azucena | 8–13 | 38.10% |
| KSM66 vs Nina | 9–11 | 45.00% |
| KSM66 vs Dragunov | 6–12 | 33.33% |
| KSM66 vs Lars | 6–11 | 35.29% |
| KSM66 vs Jack-8 | 8–8 | 50.00% |
| KSM66 vs Devil Jin | 11–5 | 68.75% |
| KSM66 vs Lee | 5–11 | 31.25% |
| KSM66 vs Jun | 8–7 | 53.33% |
| KSM66 vs Feng | 5–9 | 35.71% |
| KSM66 vs Leo | 6–8 | 42.86% |
| KSM66 vs Alisa | 4–10 | 28.57% |
| KSM66 vs Victor | 8–6 | 57.14% |
| KSM66 vs Lili | 3–7 | 30.00% |
| KSM66 vs Claudio | 3–4 | 42.86% |
| KSM66 vs Xiaoyu | 4–2 | 66.67% |
| KSM66 vs Raven | 2–4 | 33.33% |
| KSM66 vs Kuma | 2–3 | 40.00% |
| KSM66 vs Leroy | 3–2 | 60.00% |
| KSM66 vs Panda | 2–2 | 50.00% |
| KSM66 vs Zafina | 2–1 | 66.67% |
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.