| Efekuso vs Kazuya | 41–18 | 69.49% |
| Efekuso vs Jin | 29–28 | 50.88% |
| Efekuso vs King | 27–29 | 48.21% |
| Efekuso vs Hwoarang | 28–28 | 50.00% |
| Efekuso vs Lee | 27–25 | 51.92% |
| Efekuso vs Bryan | 24–24 | 50.00% |
| Efekuso vs Steve | 23–24 | 48.94% |
| Efekuso vs Yoshimitsu | 28–15 | 65.12% |
| Efekuso vs Lars | 22–17 | 56.41% |
| Efekuso vs Dragunov | 23–14 | 62.16% |
| Efekuso vs Clive | 21–16 | 56.76% |
| Efekuso vs Jun | 21–11 | 65.62% |
| Efekuso vs Paul | 11–20 | 35.48% |
| Efekuso vs Law | 18–13 | 58.06% |
| Efekuso vs Reina | 20–11 | 64.52% |
| Efekuso vs Asuka | 17–11 | 60.71% |
| Efekuso vs Lili | 17–11 | 60.71% |
| Efekuso vs Alisa | 12–11 | 52.17% |
| Efekuso vs Devil Jin | 15–7 | 68.18% |
| Efekuso vs Heihachi | 12–9 | 57.14% |
| Efekuso vs Feng | 13–6 | 68.42% |
| Efekuso vs Azucena | 7–9 | 43.75% |
| Efekuso vs Jack-8 | 7–8 | 46.67% |
| Efekuso vs Raven | 10–5 | 66.67% |
| Efekuso vs Lidia | 7–8 | 46.67% |
| Efekuso vs Anna | 10–5 | 66.67% |
| Efekuso vs Zafina | 3–11 | 21.43% |
| Efekuso vs Claudio | 10–3 | 76.92% |
| Efekuso vs Miary Zo | 6–7 | 46.15% |
| Efekuso vs Eddy | 5–6 | 45.45% |
| Efekuso vs Leroy | 7–3 | 70.00% |
| Efekuso vs Leo | 2–7 | 22.22% |
| Efekuso vs Shaheen | 5–4 | 55.56% |
| Efekuso vs Nina | 5–3 | 62.50% |
| Efekuso vs Armor King | 5–3 | 62.50% |
| Efekuso vs Xiaoyu | 4–3 | 57.14% |
| Efekuso vs Victor | 4–3 | 57.14% |
| Efekuso vs Kuma | 2–4 | 33.33% |
| Efekuso vs Fahkumram | 3–3 | 50.00% |
| Efekuso vs Panda | 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.