Nothingness: But there's no reason not to show a record of pieces that have been captured, especially the known ones. Use a question mark for unknown pieces if you must, but put up a list. Computers are great at keeping track of stuff for us. Let's make the game better by letting it do this menial task for us. You can still use notes for things like losing a capture attempt to a higher piece and other details that the better players record but that novices do not.