Hmm, 0 blocks (bytes?) for chess_startup and chess_startup.launch chessui, all the size 312 blocks is in chessui.launch. This only assumes that those four are the application files for chess, and that there arn't more elsewhere (28 chfn? 28 chsh? 0 chvt?)

Of course you delete files you think are related, at your own risk. I guess the risk is limited to a re-flash, unless there is a directory you could boltch up that would prevent even that.