The longest chess game is 269 moves (Ivan Nikolic - Goran Arsovic, Belgrade 1989) which ended in a draw after over 20 hours of play. Two other games have gone to 200 or more moves. In 1988 at the Saloniki Olympiad, Seirawan and Xu Jun played 198 moves, which ended in a stalemate.The longest won game for White is 193 moves (Stepak - Mashian, Israeli Championship 1980). That involved a Queen and Pawns vs. Queen endgame. The longest won game for Black is 161 moves (Duras - Janowski, San Sebastian 1911). The longest game in a World Championship match was Korchnoi-Karpov, Baguio 1978. It was drawn (stalemate) in 124 moves.