| Kosiarz vs Hwoarang | 6–5 | 54.55% |
| Kosiarz vs King | 5–4 | 55.56% |
| Kosiarz vs Jin | 2–3 | 40.00% |
| Kosiarz vs Law | 4–0 | 100.00% |
| Kosiarz vs Kazuya | 2–2 | 50.00% |
| Kosiarz vs Dragunov | 3–1 | 75.00% |
| Kosiarz vs Jun | 2–2 | 50.00% |
| Kosiarz vs Asuka | 1–2 | 33.33% |
| Kosiarz vs Lili | 2–1 | 66.67% |
| Kosiarz vs Nina | 1–2 | 33.33% |
| Kosiarz vs Zafina | 2–1 | 66.67% |
| Kosiarz vs Eddy | 1–2 | 33.33% |
| Kosiarz vs Paul | 0–2 | 0.00% |
| Kosiarz vs Yoshimitsu | 1–1 | 50.00% |
| Kosiarz vs Xiaoyu | 2–0 | 100.00% |
| Kosiarz vs Steve | 0–2 | 0.00% |
| Kosiarz vs Lars | 1–1 | 50.00% |
| Kosiarz vs Reina | 1–1 | 50.00% |
| Kosiarz vs Bryan | 0–1 | 0.00% |
| Kosiarz vs Feng | 1–0 | 100.00% |
| Kosiarz vs Lee | 1–0 | 100.00% |
| Kosiarz vs Kuma | 0–1 | 0.00% |
| Kosiarz vs Panda | 0–1 | 0.00% |
| Kosiarz vs Victor | 1–0 | 100.00% |
| Kosiarz vs Raven | 1–0 | 100.00% |
| Kosiarz vs Anna | 1–0 | 100.00% |
| Kosiarz vs Fahkumram | 0–1 | 0.00% |
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.