    He was also very good at understanding people, and was brilliant at wizard’s chess. He taught Harry bits and pieces whenever they had a spare moment. Harry was quite certain he would never beat his friend at chess, simply because Ron had no problems with completely annihilating him every game. When Harry had mentioned the behaviour of the older Slytherins to his friends, as a sort of warning, Ron admitted he'd been watching them as well. He said he didn't know why, but the thought of being pulled into one of those groups made him nervous.