| Shack vs Bryan | 34–13 | 72.34% |
| Shack vs Paul | 21–20 | 51.22% |
| Shack vs Steve | 23–14 | 62.16% |
| Shack vs King | 21–14 | 60.00% |
| Shack vs Kazuya | 20–13 | 60.61% |
| Shack vs Law | 23–9 | 71.88% |
| Shack vs Jin | 6–21–1 | 22.22% |
| Shack vs Reina | 16–8 | 66.67% |
| Shack vs Hwoarang | 11–11 | 50.00% |
| Shack vs Dragunov | 11–11 | 50.00% |
| Shack vs Lee | 7–14 | 33.33% |
| Shack vs Lili | 12–6 | 66.67% |
| Shack vs Leo | 9–9 | 50.00% |
| Shack vs Jun | 5–13 | 27.78% |
| Shack vs Devil Jin | 9–8 | 52.94% |
| Shack vs Clive | 3–12 | 20.00% |
| Shack vs Yoshimitsu | 3–11 | 21.43% |
| Shack vs Heihachi | 5–8 | 38.46% |
| Shack vs Lidia | 5–7 | 41.67% |
| Shack vs Alisa | 7–4 | 63.64% |
| Shack vs Nina | 3–8 | 27.27% |
| Shack vs Eddy | 6–5 | 54.55% |
| Shack vs Xiaoyu | 7–2 | 77.78% |
| Shack vs Lars | 4–3 | 57.14% |
| Shack vs Victor | 2–5 | 28.57% |
| Shack vs Claudio | 3–3 | 50.00% |
| Shack vs Kuma | 3–3 | 50.00% |
| Shack vs Azucena | 3–3 | 50.00% |
| Shack vs Raven | 5–1 | 83.33% |
| Shack vs Jack-8 | 4–1 | 80.00% |
| Shack vs Asuka | 3–2 | 60.00% |
| Shack vs Leroy | 1–2 | 33.33% |
| Shack vs Shaheen | 0–1 | 0.00% |
| Shack vs Anna | 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.