Commentary for white move 39:

GK MOVE: 39 Nf5

YASSER SEIRAWAN: Going after the g7 pawn.

PATRICK WOLFF: Now, this is a very interesting type of position. Bobby Fischer in his classic book "My 60 memorable games" annotated he game he played against Max you've you've, and it was a very interesting game where he had a initiative but at the cost of several sets of pawns. And he said white had an advantage, and he said at the end of his comments "These are the kinds of positions that are going to give computers fits." And he was actually absolutely right. It was interesting that he said because it was many years before anybody anticipated it would be a real issue but he was completely correct. Here in this position white has two sets of doubled pawns, pawns on b3 and b5 and g3 and b5. Normally doubled pawns are bad, and they are bad, but what's important now is white has this very strong pawn on g5 and black's pawn on g7 is very difficult to defend. White would be very happy to trade one of these two pawns for this guy so long as he can get his own g-pawn going quickly. So what I think Garry was hoping is that the computer may have misevaluated this position and may not understand the danger because sometimes computers have trouble understanding how dangerous these passed pawns are going to be before it's too late to stop it from getting a queen. But, maybe not.

YASSER SEIRAWAN: Looks pretty good. One of the things that I pointed out many, many times is that in pawn play, and the understanding of pawns, it still remains a critical computer weakness and you just pointed out very well about the doubled pawn. What will Deep Blue play now that we've seen the move Nf5? You're absolutely right. White's ready to harpoon not just the g7 pawn but also the h5 pawn. He can play Nxg7 Nxh5. Are we going to see now the move Nf2-d4? Shall we have a look at that?

PATRICK WOLFF: I don't see another move that really makes sense here. I think Ne4.

YASSER SEIRAWAN: Okay, after Ne4 -- but now we have this move Nxg7 Rxg7 -- excuse me, Patrick. Rxg7, doesn't that get us into a knight ending with an extra pawn, a pawn up?

PATRICK WOLFF: Well, it does get us into that.

MIKE VALVO: It may not be winable.

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