Garry Kasparov showed us what 'Anti Computer Chess' was today and played cat and mouse with Deep Blue, accumulating small advantages without risking anything. Deep Blue seemed a little bemused at first and played a few innacurate and weakening moves but it came right back into the game with a retreat that no one had foreseen.

Kasparov kept his nerve, and the advantage, but consumed valuable thinking time and could be seen chiding himself at one point when he appeared to have missed the best move.

With the tension rising, Deep Blue was provoked into an unsound attack that weakened its position still further -- but such was the ferocity of its assault that it took all of Kasparov's tactical skill to rebuff the computer.

Although nominally ahead on material, Deep Blue was strategically lost after the queens were exchanged and the world champion methodically wrapped up the endgame.

Deep Blue has white tomorrow, and Kasparov will find it much harder to control the play.