| Qastle vs Jin | 18–26 | 40.91% |
| Qastle vs Reina | 17–26 | 39.53% |
| Qastle vs King | 18–18 | 50.00% |
| Qastle vs Kazuya | 17–15 | 53.12% |
| Qastle vs Steve | 13–18 | 41.94% |
| Qastle vs Hwoarang | 16–13 | 55.17% |
| Qastle vs Paul | 15–12 | 55.56% |
| Qastle vs Lili | 16–11 | 59.26% |
| Qastle vs Azucena | 10–12 | 45.45% |
| Qastle vs Victor | 10–12 | 45.45% |
| Qastle vs Eddy | 12–10 | 54.55% |
| Qastle vs Lars | 6–15 | 28.57% |
| Qastle vs Lee | 4–15 | 21.05% |
| Qastle vs Law | 9–9 | 50.00% |
| Qastle vs Devil Jin | 5–13 | 27.78% |
| Qastle vs Jun | 12–5 | 70.59% |
| Qastle vs Raven | 8–9 | 47.06% |
| Qastle vs Bryan | 8–8 | 50.00% |
| Qastle vs Feng | 9–5 | 64.29% |
| Qastle vs Yoshimitsu | 11–2 | 84.62% |
| Qastle vs Asuka | 7–6 | 53.85% |
| Qastle vs Dragunov | 8–5 | 61.54% |
| Qastle vs Leo | 7–6 | 53.85% |
| Qastle vs Xiaoyu | 5–7 | 41.67% |
| Qastle vs Nina | 6–5 | 54.55% |
| Qastle vs Leroy | 5–4 | 55.56% |
| Qastle vs Jack-8 | 4–3 | 57.14% |
| Qastle vs Alisa | 2–5 | 28.57% |
| Qastle vs Shaheen | 3–4 | 42.86% |
| Qastle vs Kuma | 2–3 | 40.00% |
| Qastle vs Zafina | 2–2 | 50.00% |
| Qastle vs Panda | 1–2 | 33.33% |
| Qastle vs Claudio | 1–1 | 50.00% |
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.