| kostless vs King | 18–40 | 31.03% |
| kostless vs Reina | 17–18 | 48.57% |
| kostless vs Kazuya | 5–29 | 14.71% |
| kostless vs Jin | 15–18 | 45.45% |
| kostless vs Hwoarang | 6–25 | 19.35% |
| kostless vs Dragunov | 11–17 | 39.29% |
| kostless vs Steve | 8–19 | 29.63% |
| kostless vs Asuka | 7–17 | 29.17% |
| kostless vs Lili | 3–17 | 15.00% |
| kostless vs Clive | 7–13 | 35.00% |
| kostless vs Law | 5–13 | 27.78% |
| kostless vs Nina | 6–12 | 33.33% |
| kostless vs Azucena | 3–12 | 20.00% |
| kostless vs Yoshimitsu | 8–6 | 57.14% |
| kostless vs Xiaoyu | 1–13 | 7.14% |
| kostless vs Bryan | 2–12 | 14.29% |
| kostless vs Lars | 5–9 | 35.71% |
| kostless vs Alisa | 3–11 | 21.43% |
| kostless vs Lee | 8–6 | 57.14% |
| kostless vs Devil Jin | 6–7 | 46.15% |
| kostless vs Eddy | 2–11 | 15.38% |
| kostless vs Lidia | 5–8 | 38.46% |
| kostless vs Victor | 4–8 | 33.33% |
| kostless vs Leo | 5–6 | 45.45% |
| kostless vs Zafina | 4–7 | 36.36% |
| kostless vs Leroy | 6–5 | 54.55% |
| kostless vs Heihachi | 6–5 | 54.55% |
| kostless vs Jun | 3–7 | 30.00% |
| kostless vs Paul | 6–3 | 66.67% |
| kostless vs Raven | 4–3 | 57.14% |
| kostless vs Feng | 0–4 | 0.00% |
| kostless vs Claudio | 3–1 | 75.00% |
| kostless vs Shaheen | 2–2 | 50.00% |
| kostless vs Jack-8 | 1–2 | 33.33% |
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.