Most moves in a chess game

The Master game with most moves on record was one of 269 moves, when Ivan Nikolic' drew with Goran Arsovic' (both Yugoslavia, now Serbia and Montenegro) in a Belgrade, Yugoslavia tournament, on 17 February 1989. It took a total of 20 hr 15 min. There is now a 50 move rule so unlikely ever to be beaten. This record is sourced by the World Chess Federation. We do not send out guidelines.