Comment by slphil

This makes no difference. Players are required to keep notation in tournament games, and the use of external software (like what is used at the top boards at some tournaments) does not absolve the players of this responsibility. Writing down the moves of the game as it is being played is a major part of playing chess, and it is one of the most important things for players to learn because it directly improves play (even disregarding reviewing the games afterwards!).