World chess champion Gary Kasparov postponed until Friday the seventh game of his title contest with challenger Anatoly Karpov in Seville, Spain, match officials said. Experts said Kasparov will use the two-day timeout to rethink his match strategy after losses in games two and five. After six games, Karpov leads by 3 1/2 points to 2 1/2. The sixth game ended in a draw Monday after Kasparov failed to capitalize on an early opening advantage. Each player may take three timeouts during the 24-game match.