| IaY_Grampa vs Jin | 16–17 | 48.48% |
| IaY_Grampa vs Bryan | 16–10 | 61.54% |
| IaY_Grampa vs Kazuya | 16–7 | 69.57% |
| IaY_Grampa vs King | 11–8 | 57.89% |
| IaY_Grampa vs Hwoarang | 12–7 | 63.16% |
| IaY_Grampa vs Lili | 13–3 | 81.25% |
| IaY_Grampa vs Dragunov | 8–6 | 57.14% |
| IaY_Grampa vs Fahkumram | 9–4 | 69.23% |
| IaY_Grampa vs Steve | 8–3 | 72.73% |
| IaY_Grampa vs Claudio | 7–3 | 70.00% |
| IaY_Grampa vs Reina | 8–2 | 80.00% |
| IaY_Grampa vs Azucena | 7–2 | 77.78% |
| IaY_Grampa vs Victor | 4–5 | 44.44% |
| IaY_Grampa vs Yoshimitsu | 5–3 | 62.50% |
| IaY_Grampa vs Asuka | 2–6 | 25.00% |
| IaY_Grampa vs Lars | 4–4 | 50.00% |
| IaY_Grampa vs Eddy | 2–6 | 25.00% |
| IaY_Grampa vs Feng | 6–1 | 85.71% |
| IaY_Grampa vs Leo | 2–5 | 28.57% |
| IaY_Grampa vs Paul | 2–4 | 33.33% |
| IaY_Grampa vs Xiaoyu | 4–2 | 66.67% |
| IaY_Grampa vs Nina | 4–1 | 80.00% |
| IaY_Grampa vs Lee | 4–1 | 80.00% |
| IaY_Grampa vs Kuma | 5–0 | 100.00% |
| IaY_Grampa vs Heihachi | 4–1 | 80.00% |
| IaY_Grampa vs Law | 2–2 | 50.00% |
| IaY_Grampa vs Jack-8 | 2–2 | 50.00% |
| IaY_Grampa vs Devil Jin | 3–1 | 75.00% |
| IaY_Grampa vs Shaheen | 2–2 | 50.00% |
| IaY_Grampa vs Zafina | 0–4 | 0.00% |
| IaY_Grampa vs Jun | 1–2 | 33.33% |
| IaY_Grampa vs Lidia | 2–1 | 66.67% |
| IaY_Grampa vs Raven | 2–0 | 100.00% |
| IaY_Grampa vs Clive | 0–2 | 0.00% |
| IaY_Grampa vs Leroy | 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.