https://highdiceroller.github.io/icepoo ... ngine.html
Based on the 1.0 SRD.
There's quite a bit of subtlety when it comes to push strategy, so let me know if you see any discrepancies. I checked this against Frank Mitchell's blogposts (one, two on the subject. However, despite being nominally about the same system, there's surprisingly little overlap due to differences between earlier YZE games and the mechanics as presented in the SRD, plus differences in pushing strategies.