| Peff vs Kazuya | 22–39 | 36.07% |
| Peff vs Jin | 16–39 | 29.09% |
| Peff vs Hwoarang | 25–29 | 46.30% |
| Peff vs Lidia | 27–27 | 50.00% |
| Peff vs Reina | 21–26 | 44.68% |
| Peff vs Law | 15–31 | 32.61% |
| Peff vs Steve | 15–27 | 35.71% |
| Peff vs King | 18–22 | 45.00% |
| Peff vs Yoshimitsu | 22–16 | 57.89% |
| Peff vs Paul | 5–24 | 17.24% |
| Peff vs Bryan | 5–22 | 18.52% |
| Peff vs Jun | 14–11 | 56.00% |
| Peff vs Azucena | 10–12 | 45.45% |
| Peff vs Jack-8 | 13–8 | 61.90% |
| Peff vs Victor | 6–12 | 33.33% |
| Peff vs Asuka | 6–11 | 35.29% |
| Peff vs Dragunov | 6–10 | 37.50% |
| Peff vs Nina | 9–7 | 56.25% |
| Peff vs Eddy | 4–12 | 25.00% |
| Peff vs Lili | 8–7 | 53.33% |
| Peff vs Lars | 6–8 | 42.86% |
| Peff vs Shaheen | 6–8 | 42.86% |
| Peff vs Xiaoyu | 10–2 | 83.33% |
| Peff vs Leo | 4–8 | 33.33% |
| Peff vs Devil Jin | 3–8 | 27.27% |
| Peff vs Lee | 3–8 | 27.27% |
| Peff vs Claudio | 3–7 | 30.00% |
| Peff vs Alisa | 3–6 | 33.33% |
| Peff vs Feng | 2–6 | 25.00% |
| Peff vs Heihachi | 1–6 | 14.29% |
| Peff vs Zafina | 4–2 | 66.67% |
| Peff vs Clive | 3–3 | 50.00% |
| Peff vs Leroy | 2–3 | 40.00% |
| Peff vs Kuma | 2–2 | 50.00% |
| Peff vs Raven | 1–2 | 33.33% |
| Peff vs Anna | 2–0 | 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.