| Iwanmastah vs King | 23–16 | 58.97% |
| Iwanmastah vs Law | 25–13 | 65.79% |
| Iwanmastah vs Steve | 16–19 | 45.71% |
| Iwanmastah vs Reina | 16–18 | 47.06% |
| Iwanmastah vs Kazuya | 18–15 | 54.55% |
| Iwanmastah vs Asuka | 16–12 | 57.14% |
| Iwanmastah vs Jin | 23–4 | 85.19% |
| Iwanmastah vs Lidia | 16–9 | 64.00% |
| Iwanmastah vs Hwoarang | 14–9 | 60.87% |
| Iwanmastah vs Jun | 8–9 | 47.06% |
| Iwanmastah vs Heihachi | 5–12 | 29.41% |
| Iwanmastah vs Bryan | 7–9 | 43.75% |
| Iwanmastah vs Feng | 13–3 | 81.25% |
| Iwanmastah vs Dragunov | 7–9 | 43.75% |
| Iwanmastah vs Devil Jin | 8–6 | 57.14% |
| Iwanmastah vs Lili | 7–6 | 53.85% |
| Iwanmastah vs Yoshimitsu | 6–6 | 50.00% |
| Iwanmastah vs Lee | 9–3 | 75.00% |
| Iwanmastah vs Azucena | 8–4 | 66.67% |
| Iwanmastah vs Victor | 6–6 | 50.00% |
| Iwanmastah vs Jack-8 | 6–4 | 60.00% |
| Iwanmastah vs Claudio | 4–6 | 40.00% |
| Iwanmastah vs Nina | 8–2 | 80.00% |
| Iwanmastah vs Eddy | 5–5 | 50.00% |
| Iwanmastah vs Paul | 8–0 | 100.00% |
| Iwanmastah vs Leroy | 4–4 | 50.00% |
| Iwanmastah vs Xiaoyu | 1–6 | 14.29% |
| Iwanmastah vs Raven | 2–5 | 28.57% |
| Iwanmastah vs Clive | 2–5 | 28.57% |
| Iwanmastah vs Lars | 2–3 | 40.00% |
| Iwanmastah vs Armor King | 3–2 | 60.00% |
| Iwanmastah vs Kuma | 4–0 | 100.00% |
| Iwanmastah vs Fahkumram | 2–2 | 50.00% |
| Iwanmastah vs Leo | 2–1 | 66.67% |
| Iwanmastah vs Panda | 0–2 | 0.00% |
| Iwanmastah vs Zafina | 0–2 | 0.00% |
| Iwanmastah vs Alisa | 1–0 | 100.00% |
| Iwanmastah 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.