| Cu chulainn vs Jin | 7–8 | 46.67% |
| Cu chulainn vs Jun | 6–9 | 40.00% |
| Cu chulainn vs Kazuya | 7–7 | 50.00% |
| Cu chulainn vs Lili | 5–9 | 35.71% |
| Cu chulainn vs King | 4–8 | 33.33% |
| Cu chulainn vs Reina | 5–7 | 41.67% |
| Cu chulainn vs Paul | 3–8 | 27.27% |
| Cu chulainn vs Law | 1–9 | 10.00% |
| Cu chulainn vs Steve | 2–8 | 20.00% |
| Cu chulainn vs Azucena | 4–5 | 44.44% |
| Cu chulainn vs Xiaoyu | 2–4 | 33.33% |
| Cu chulainn vs Raven | 1–4 | 20.00% |
| Cu chulainn vs Leo | 3–2 | 60.00% |
| Cu chulainn vs Hwoarang | 2–2 | 50.00% |
| Cu chulainn vs Feng | 2–2 | 50.00% |
| Cu chulainn vs Dragunov | 0–4 | 0.00% |
| Cu chulainn vs Claudio | 1–3 | 25.00% |
| Cu chulainn vs Nina | 2–2 | 50.00% |
| Cu chulainn vs Leroy | 3–1 | 75.00% |
| Cu chulainn vs Eddy | 0–4 | 0.00% |
| Cu chulainn vs Lars | 2–2 | 50.00% |
| Cu chulainn vs Kuma | 1–3 | 25.00% |
| Cu chulainn vs Asuka | 1–2 | 33.33% |
| Cu chulainn vs Bryan | 0–2 | 0.00% |
| Cu chulainn vs Devil Jin | 1–1 | 50.00% |
| Cu chulainn vs Shaheen | 0–2 | 0.00% |
| Cu chulainn vs Lee | 1–1 | 50.00% |
| Cu chulainn vs Zafina | 0–2 | 0.00% |
| Cu chulainn vs Alisa | 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.