A few signs: - taking a while to make an obvious move, especially in the endgame, where there might actually be only one move that makes any sense to make - t

A few signs: - taking a while to make an obvious move, especially in the endgame, where there might actually be only one move that makes any sense to make - taking a very consistent amount of time between moves - shuffling pieces around in a way that doesn't really accomplish anything but also doesn't cause anything bad - playing normally, then a big pause and they go offline for a bit, then come back and start playing much better (connecting the client to an engine)