| Koshimae vs Reina | 21–21 | 50.00% |
| Koshimae vs King | 13–2 | 86.67% |
| Koshimae vs Jun | 4–10 | 28.57% |
| Koshimae vs Hwoarang | 2–9 | 18.18% |
| Koshimae vs Eddy | 3–8 | 27.27% |
| Koshimae vs Steve | 1–9 | 10.00% |
| Koshimae vs Jin | 5–3 | 62.50% |
| Koshimae vs Kazuya | 3–4 | 42.86% |
| Koshimae vs Victor | 3–4 | 42.86% |
| Koshimae vs Asuka | 2–4 | 33.33% |
| Koshimae vs Lili | 3–3 | 50.00% |
| Koshimae vs Paul | 1–4 | 20.00% |
| Koshimae vs Law | 2–3 | 40.00% |
| Koshimae vs Feng | 3–2 | 60.00% |
| Koshimae vs Bryan | 3–1 | 75.00% |
| Koshimae vs Lars | 1–3 | 25.00% |
| Koshimae vs Azucena | 3–1 | 75.00% |
| Koshimae vs Xiaoyu | 0–3 | 0.00% |
| Koshimae vs Dragunov | 2–1 | 66.67% |
| Koshimae vs Leo | 3–0 | 100.00% |
| Koshimae vs Claudio | 1–2 | 33.33% |
| Koshimae vs Leroy | 1–2 | 33.33% |
| Koshimae vs Devil Jin | 2–0 | 100.00% |
| Koshimae vs Kuma | 0–2 | 0.00% |
| Koshimae vs Panda | 0–2 | 0.00% |
| Koshimae vs Yoshimitsu | 0–1 | 0.00% |
| Koshimae vs Shaheen | 0–1 | 0.00% |
| Koshimae vs Nina | 0–1 | 0.00% |
| Koshimae vs Lee | 1–0 | 100.00% |
| Koshimae vs Raven | 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.