Commentary for white move 28:

MAURICE ASHLEY: Moving so quickly that suggests that Deep Blue also believed that Re1 was Kasparov's only move and anticipated that response and now has played knight back to b6. And it seems that Kasparov is forced to play, and he has played --

GK MOVE: 27 Qc2.

MAURICE ASHLEY: -- queen back to c2. ^ and ^ something the very subtle question is what has Kasparov gained in this tit for tat? It looks like a shift in position, Susan --

SUSAN POLGAR: The knight is back on b6 back to defend. And if it wants to come back, it has to lose time. So it's an advantage for Garry.

YASSER SEIRAWAN: It's like a shift. Before, previously, Garry controlled the open d-file. Now he controls the open e-file. So they swapped controls of the file, and Garry probably felt that it was better for him to control the e-file. In this particular case, if this knight on g4 doesn't one day capture the pawn on f2, it may end up out of the game. By controlling the e5 square like Garry has done maybe later, much, much later there's a possibility that this knight will be left hanging in the air. Still, I don't see any really visible reasons why Deep Blue should be disturbed by this position. I mean I think Deep Blue has basically got a fine position.

SUSAN POLGAR: Probably the knight will come back to c4.

YASSER SEIRAWAN: Indeed, knight back to c4 is a good move.

MAURICE ASHLEY: We will take further questions from the audience. I should point out before that question is asked that Kasparov has 20 minutes left to make his remaining 12 moves. That's something --

YASSER SEIRAWAN: 14.

MAURICE ASHLEY: Sorry, we are at move 28. He has 12 moves to make. That's a little pressure. Anything fancy, complicated happens in the next few moves and Kasparov has to go into a ten-minute think, the heat is on. So he has to be very careful that he controls the tactics of this position, because Deep Blue is whipping out the /SKPHAO*UFZ it won't have a problem.

AUDIENCE MEMBER: Thank you. I have a question for Susan Polgar. After game three we heard Garry Kasparov I think very strongly imply that he suspected that IBM was somehow using human intervention to augment the moves of the computer. And those of us have followed chess have often been startled by the sort of claims that world champions make during matches, messages of sent in yogurt, that rays are coming in through the chair or through the lights. And I was wondering -- or the psychics in the audience are trying to disrupt the thinking of the player.

Real-time text commentary is made possible by LiveNote, Inc. and Vincent Varallo Associates