| Y_SEIYA_Y vs King | 14–20 | 41.18% |
| Y_SEIYA_Y vs Jin | 11–20 | 35.48% |
| Y_SEIYA_Y vs Reina | 18–10 | 64.29% |
| Y_SEIYA_Y vs Eddy | 8–20 | 28.57% |
| Y_SEIYA_Y vs Steve | 12–15 | 44.44% |
| Y_SEIYA_Y vs Asuka | 3–22 | 12.00% |
| Y_SEIYA_Y vs Lili | 11–14 | 44.00% |
| Y_SEIYA_Y vs Xiaoyu | 8–15 | 34.78% |
| Y_SEIYA_Y vs Kazuya | 11–12 | 47.83% |
| Y_SEIYA_Y vs Dragunov | 15–5 | 75.00% |
| Y_SEIYA_Y vs Bryan | 4–12 | 25.00% |
| Y_SEIYA_Y vs Azucena | 8–8 | 50.00% |
| Y_SEIYA_Y vs Jack-8 | 7–8 | 46.67% |
| Y_SEIYA_Y vs Hwoarang | 6–8 | 42.86% |
| Y_SEIYA_Y vs Paul | 5–8 | 38.46% |
| Y_SEIYA_Y vs Heihachi | 4–9 | 30.77% |
| Y_SEIYA_Y vs Nina | 4–8 | 33.33% |
| Y_SEIYA_Y vs Law | 3–7 | 30.00% |
| Y_SEIYA_Y vs Lee | 1–7 | 12.50% |
| Y_SEIYA_Y vs Lidia | 5–3 | 62.50% |
| Y_SEIYA_Y vs Feng | 0–6 | 0.00% |
| Y_SEIYA_Y vs Lars | 3–3 | 50.00% |
| Y_SEIYA_Y vs Clive | 4–2 | 66.67% |
| Y_SEIYA_Y vs Alisa | 1–4 | 20.00% |
| Y_SEIYA_Y vs Devil Jin | 4–0 | 100.00% |
| Y_SEIYA_Y vs Jun | 2–2 | 50.00% |
| Y_SEIYA_Y vs Victor | 3–1 | 75.00% |
| Y_SEIYA_Y vs Shaheen | 0–3 | 0.00% |
| Y_SEIYA_Y vs Leroy | 1–2 | 33.33% |
| Y_SEIYA_Y vs Zafina | 0–2 | 0.00% |
| Y_SEIYA_Y vs Anna | 0–2 | 0.00% |
| Y_SEIYA_Y vs Leo | 0–1 | 0.00% |
| Y_SEIYA_Y vs Kuma | 0–1 | 0.00% |
| Y_SEIYA_Y vs Raven | 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.