| Pietruszki vs Jin | 5–3 | 62.50% |
| Pietruszki vs Kazuya | 2–4 | 33.33% |
| Pietruszki vs Steve | 2–4 | 33.33% |
| Pietruszki vs Fahkumram | 3–3 | 50.00% |
| Pietruszki vs Law | 2–3 | 40.00% |
| Pietruszki vs Hwoarang | 2–2 | 50.00% |
| Pietruszki vs Asuka | 3–1 | 75.00% |
| Pietruszki vs Miary Zo | 1–3 | 25.00% |
| Pietruszki vs Lili | 1–2 | 33.33% |
| Pietruszki vs Jun | 2–1 | 66.67% |
| Pietruszki vs Victor | 3–0 | 100.00% |
| Pietruszki vs Yoshimitsu | 1–1 | 50.00% |
| Pietruszki vs Feng | 1–1 | 50.00% |
| Pietruszki vs Lars | 0–2 | 0.00% |
| Pietruszki vs Azucena | 0–2 | 0.00% |
| Pietruszki vs Eddy | 0–2 | 0.00% |
| Pietruszki vs Paul | 1–0 | 100.00% |
| Pietruszki vs Bryan | 0–1 | 0.00% |
| Pietruszki vs Devil Jin | 0–1 | 0.00% |
| Pietruszki vs Dragunov | 0–1 | 0.00% |
| Pietruszki vs Alisa | 0–1 | 0.00% |
| Pietruszki vs Shaheen | 1–0 | 100.00% |
| Pietruszki vs Lidia | 1–0 | 100.00% |
| Pietruszki vs Anna | 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.