| KOST9H vs Lili | 4–3 | 57.14% |
| KOST9H vs Dragunov | 4–3 | 57.14% |
| KOST9H vs Reina | 2–5 | 28.57% |
| KOST9H vs Kazuya | 1–4 | 20.00% |
| KOST9H vs Armor King | 2–2 | 50.00% |
| KOST9H vs Law | 3–0 | 100.00% |
| KOST9H vs Jin | 3–0 | 100.00% |
| KOST9H vs Bryan | 1–2 | 33.33% |
| KOST9H vs Leroy | 2–1 | 66.67% |
| KOST9H vs Azucena | 3–0 | 100.00% |
| KOST9H vs Victor | 3–0 | 100.00% |
| KOST9H vs Fahkumram | 2–1 | 66.67% |
| KOST9H vs King | 2–0 | 100.00% |
| KOST9H vs Lars | 2–0 | 100.00% |
| KOST9H vs Alisa | 2–0 | 100.00% |
| KOST9H vs Claudio | 0–2 | 0.00% |
| KOST9H vs Shaheen | 0–2 | 0.00% |
| KOST9H vs Lidia | 2–0 | 100.00% |
| KOST9H vs Devil Jin | 1–0 | 100.00% |
| KOST9H vs Zafina | 1–0 | 100.00% |
| KOST9H vs Clive | 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.