| Koenma vs Steve | 5–9 | 35.71% |
| Koenma vs Reina | 6–6 | 50.00% |
| Koenma vs Hwoarang | 3–5 | 37.50% |
| Koenma vs King | 3–3 | 50.00% |
| Koenma vs Jin | 0–5–1 | 0.00% |
| Koenma vs Clive | 2–3 | 40.00% |
| Koenma vs Victor | 1–3 | 25.00% |
| Koenma vs Miary Zo | 2–2 | 50.00% |
| Koenma vs Law | 1–2 | 33.33% |
| Koenma vs Xiaoyu | 1–2 | 33.33% |
| Koenma vs Asuka | 0–3 | 0.00% |
| Koenma vs Lars | 2–1 | 66.67% |
| Koenma vs Claudio | 2–1 | 66.67% |
| Koenma vs Lidia | 1–2 | 33.33% |
| Koenma vs Armor King | 1–2 | 33.33% |
| Koenma vs Kazuya | 0–2 | 0.00% |
| Koenma vs Jack-8 | 1–1 | 50.00% |
| Koenma vs Lili | 0–2 | 0.00% |
| Koenma vs Shaheen | 0–2 | 0.00% |
| Koenma vs Nina | 1–1 | 50.00% |
| Koenma vs Zafina | 2–0 | 100.00% |
| Koenma vs Leroy | 0–2 | 0.00% |
| Koenma vs Yoshimitsu | 0–1 | 0.00% |
| Koenma vs Devil Jin | 1–0 | 100.00% |
| Koenma vs Feng | 0–1 | 0.00% |
| Koenma vs Panda | 0–1 | 0.00% |
| Koenma vs Eddy | 0–1 | 0.00% |
| Koenma vs Heihachi | 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.