| Nachtmahr vs King | 8–9 | 47.06% |
| Nachtmahr vs Jin | 3–8 | 27.27% |
| Nachtmahr vs Kazuya | 4–7 | 36.36% |
| Nachtmahr vs Clive | 5–4 | 55.56% |
| Nachtmahr vs Nina | 2–5 | 28.57% |
| Nachtmahr vs Reina | 5–1 | 83.33% |
| Nachtmahr vs Azucena | 3–3 | 50.00% |
| Nachtmahr vs Yoshimitsu | 3–2 | 60.00% |
| Nachtmahr vs Paul | 3–1 | 75.00% |
| Nachtmahr vs Steve | 4–0 | 100.00% |
| Nachtmahr vs Lili | 2–2 | 50.00% |
| Nachtmahr vs Alisa | 2–2 | 50.00% |
| Nachtmahr vs Eddy | 0–4 | 0.00% |
| Nachtmahr vs Law | 2–1 | 66.67% |
| Nachtmahr vs Bryan | 1–2 | 33.33% |
| Nachtmahr vs Claudio | 2–1 | 66.67% |
| Nachtmahr vs Jun | 2–1 | 66.67% |
| Nachtmahr vs Victor | 2–1 | 66.67% |
| Nachtmahr vs Lidia | 1–2 | 33.33% |
| Nachtmahr vs Xiaoyu | 1–1 | 50.00% |
| Nachtmahr vs Jack-8 | 0–2 | 0.00% |
| Nachtmahr vs Asuka | 2–0 | 100.00% |
| Nachtmahr vs Dragunov | 0–2 | 0.00% |
| Nachtmahr vs Shaheen | 2–0 | 100.00% |
| Nachtmahr vs Devil Jin | 1–0 | 100.00% |
| Nachtmahr vs Lee | 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.