| KOS-MOS vs Law | 21–8 | 72.41% |
| KOS-MOS vs Steve | 18–10 | 64.29% |
| KOS-MOS vs Dragunov | 14–13 | 51.85% |
| KOS-MOS vs Heihachi | 19–8 | 70.37% |
| KOS-MOS vs Bryan | 16–7 | 69.57% |
| KOS-MOS vs King | 15–7 | 68.18% |
| KOS-MOS vs Hwoarang | 16–6 | 72.73% |
| KOS-MOS vs Reina | 16–5 | 76.19% |
| KOS-MOS vs Azucena | 13–6 | 68.42% |
| KOS-MOS vs Jun | 11–6 | 64.71% |
| KOS-MOS vs Jin | 7–9 | 43.75% |
| KOS-MOS vs Lili | 13–3 | 81.25% |
| KOS-MOS vs Kazuya | 7–7 | 50.00% |
| KOS-MOS vs Lee | 7–7 | 50.00% |
| KOS-MOS vs Victor | 5–8 | 38.46% |
| KOS-MOS vs Paul | 10–1 | 90.91% |
| KOS-MOS vs Lars | 10–1 | 90.91% |
| KOS-MOS vs Kuma | 9–2 | 81.82% |
| KOS-MOS vs Lidia | 5–6 | 45.45% |
| KOS-MOS vs Devil Jin | 4–6 | 40.00% |
| KOS-MOS vs Zafina | 6–4 | 60.00% |
| KOS-MOS vs Xiaoyu | 4–5 | 44.44% |
| KOS-MOS vs Feng | 7–2 | 77.78% |
| KOS-MOS vs Alisa | 8–1 | 88.89% |
| KOS-MOS vs Shaheen | 5–3 | 62.50% |
| KOS-MOS vs Jack-8 | 4–3 | 57.14% |
| KOS-MOS vs Asuka | 5–2 | 71.43% |
| KOS-MOS vs Leo | 4–3 | 57.14% |
| KOS-MOS vs Clive | 1–6 | 14.29% |
| KOS-MOS vs Claudio | 3–2 | 60.00% |
| KOS-MOS vs Panda | 1–4 | 20.00% |
| KOS-MOS vs Yoshimitsu | 2–2 | 50.00% |
| KOS-MOS vs Raven | 4–0 | 100.00% |
| KOS-MOS vs Nina | 1–2 | 33.33% |
| KOS-MOS vs Leroy | 3–0 | 100.00% |
| KOS-MOS vs Eddy | 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.