| JShack vs King | 44–51 | 46.32% |
| JShack vs Reina | 45–47 | 48.91% |
| JShack vs Kazuya | 50–39 | 56.18% |
| JShack vs Jin | 42–31 | 57.53% |
| JShack vs Steve | 38–28 | 57.58% |
| JShack vs Clive | 24–37 | 39.34% |
| JShack vs Lili | 28–30 | 48.28% |
| JShack vs Bryan | 26–23 | 53.06% |
| JShack vs Hwoarang | 25–19 | 56.82% |
| JShack vs Heihachi | 22–22 | 50.00% |
| JShack vs Asuka | 23–20 | 53.49% |
| JShack vs Azucena | 25–18 | 58.14% |
| JShack vs Eddy | 18–25 | 41.86% |
| JShack vs Paul | 18–22 | 45.00% |
| JShack vs Leroy | 22–18 | 55.00% |
| JShack vs Leo | 20–19 | 51.28% |
| JShack vs Yoshimitsu | 17–21 | 44.74% |
| JShack vs Xiaoyu | 17–20 | 45.95% |
| JShack vs Nina | 12–25 | 32.43% |
| JShack vs Law | 13–23 | 36.11% |
| JShack vs Dragunov | 15–20 | 42.86% |
| JShack vs Feng | 16–17 | 48.48% |
| JShack vs Lars | 13–19 | 40.62% |
| JShack vs Jun | 17–15 | 53.12% |
| JShack vs Raven | 17–15 | 53.12% |
| JShack vs Jack-8 | 15–16 | 48.39% |
| JShack vs Lidia | 14–16 | 46.67% |
| JShack vs Victor | 12–16 | 42.86% |
| JShack vs Devil Jin | 12–10 | 54.55% |
| JShack vs Lee | 11–8 | 57.89% |
| JShack vs Zafina | 7–9 | 43.75% |
| JShack vs Alisa | 7–8 | 46.67% |
| JShack vs Kuma | 6–8 | 42.86% |
| JShack vs Claudio | 4–9 | 30.77% |
| JShack vs Shaheen | 2–5 | 28.57% |
| JShack vs Panda | 0–5 | 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.