Paste the report of a fight into the box below to get an analysis of what happened in the battle.
Start from the line "You attack province N" for your attacks or "Your province N is under attack" for your defences
Copy all the way down to the end of the combat rolls to get the full analysis.

Note, the analysis is statistical in nature, so will be more accurate for longer fights.
An estimated EFF over 99 does not mean there is a bug, just that there is not enough information for a more accurate estimate (or that the rolls were very lucky!)