Autosave is saving between turns, after enemies move but before they attack. Meaning if you load an autosave your turn begins and the enemy never attacks. If you set autosave to 1 you can literally reload every time you are attacked to make it never happen, it is currently impossible to lose the game like this. Autosave used to save before your turn ended, so if you reloaded an autosave it would be at the end of your last turn, I don't know why it was changed, but it's broken now.
