| RealKostlaw vs King | 23–32 | 41.82% |
| RealKostlaw vs Kazuya | 24–16 | 60.00% |
| RealKostlaw vs Steve | 13–15–1 | 46.43% |
| RealKostlaw vs Armor King | 12–15 | 44.44% |
| RealKostlaw vs Law | 14–9 | 60.87% |
| RealKostlaw vs Hwoarang | 14–9 | 60.87% |
| RealKostlaw vs Asuka | 18–5 | 78.26% |
| RealKostlaw vs Reina | 11–12 | 47.83% |
| RealKostlaw vs Victor | 14–8 | 63.64% |
| RealKostlaw vs Heihachi | 16–5 | 76.19% |
| RealKostlaw vs Jin | 11–9 | 55.00% |
| RealKostlaw vs Paul | 10–9 | 52.63% |
| RealKostlaw vs Bryan | 11–8 | 57.89% |
| RealKostlaw vs Dragunov | 8–11 | 42.11% |
| RealKostlaw vs Jun | 7–12 | 36.84% |
| RealKostlaw vs Nina | 8–5 | 61.54% |
| RealKostlaw vs Miary Zo | 7–6 | 53.85% |
| RealKostlaw vs Feng | 3–9 | 25.00% |
| RealKostlaw vs Lili | 5–7 | 41.67% |
| RealKostlaw vs Raven | 7–4 | 63.64% |
| RealKostlaw vs Eddy | 4–7 | 36.36% |
| RealKostlaw vs Leo | 4–6 | 40.00% |
| RealKostlaw vs Clive | 4–6 | 40.00% |
| RealKostlaw vs Alisa | 1–8 | 11.11% |
| RealKostlaw vs Anna | 6–3 | 66.67% |
| RealKostlaw vs Jack-8 | 1–7 | 12.50% |
| RealKostlaw vs Lars | 6–2 | 75.00% |
| RealKostlaw vs Leroy | 2–6 | 25.00% |
| RealKostlaw vs Devil Jin | 3–3 | 50.00% |
| RealKostlaw vs Yoshimitsu | 1–4 | 20.00% |
| RealKostlaw vs Xiaoyu | 3–2 | 60.00% |
| RealKostlaw vs Zafina | 3–2 | 60.00% |
| RealKostlaw vs Azucena | 3–2 | 60.00% |
| RealKostlaw vs Lidia | 3–2 | 60.00% |
| RealKostlaw vs Panda | 2–2 | 50.00% |
| RealKostlaw vs Lee | 0–2 | 0.00% |
| RealKostlaw vs Claudio | 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.