That sounds like it'd work Fencer. We just need something to tip us off. Though I'd like to know how many blots my opponent has on the bar that must come off as soon as they can too. Helps one form a strategy about which move to make sometimes. It'd be a lot quicker than running the game backwards and trying to figure out what happened using the game graphics. That's why I mentioned using colors, or place captured blots slightly different. Perhaps it'd be easier to have the initial blots start with a different color or position and put the captured blots in their usual place or with their usual color. You could tag them somehow, and then remove the tag after they've been brought into play.