This tool enables you to calculate the possible outcome of Raids in SpaceHunt Game. Choose the Attacker's units and then the Defender's units and buldings, modify their research levels if necessary and click on Raid. A simplified Battle Log will be shown, if the result is tight, it is recommended to click Raid a few more times just to see how it can vary. Luck plays a tiny part in the game but can certainly affect the outcome in certain situations! The battle dynamics are explained thoroughly here.
To learn more about SpaceHunt you can go to the home page where the full game is explained and there's plenty of guides available for all expertise and levels.