| KOS-MOS vs King | 15–17 | 46.88% |
| KOS-MOS vs Reina | 14–15 | 48.28% |
| KOS-MOS vs Steve | 12–14 | 46.15% |
| KOS-MOS vs Yoshimitsu | 10–14 | 41.67% |
| KOS-MOS vs Victor | 14–10 | 58.33% |
| KOS-MOS vs Paul | 8–12 | 40.00% |
| KOS-MOS vs Lidia | 8–8 | 50.00% |
| KOS-MOS vs Dragunov | 6–9 | 40.00% |
| KOS-MOS vs Asuka | 7–7 | 50.00% |
| KOS-MOS vs Jin | 6–7 | 46.15% |
| KOS-MOS vs Lili | 5–7 | 41.67% |
| KOS-MOS vs Leo | 5–7 | 41.67% |
| KOS-MOS vs Kazuya | 2–9 | 18.18% |
| KOS-MOS vs Feng | 6–5 | 54.55% |
| KOS-MOS vs Hwoarang | 4–6 | 40.00% |
| KOS-MOS vs Lars | 3–5 | 37.50% |
| KOS-MOS vs Jun | 3–5 | 37.50% |
| KOS-MOS vs Bryan | 3–4 | 42.86% |
| KOS-MOS vs Devil Jin | 3–4 | 42.86% |
| KOS-MOS vs Azucena | 2–4 | 33.33% |
| KOS-MOS vs Law | 3–2 | 60.00% |
| KOS-MOS vs Xiaoyu | 1–4 | 20.00% |
| KOS-MOS vs Lee | 1–4 | 20.00% |
| KOS-MOS vs Leroy | 2–3 | 40.00% |
| KOS-MOS vs Alisa | 0–3 | 0.00% |
| KOS-MOS vs Nina | 0–3 | 0.00% |
| KOS-MOS vs Raven | 2–1 | 66.67% |
| KOS-MOS vs Claudio | 1–1 | 50.00% |
| KOS-MOS vs Zafina | 2–0 | 100.00% |
| KOS-MOS vs Jack-8 | 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.