Commentary for white move 26:

The other thing that, Susan, you brought up for yourself, and I know that's absolutely true. Historically there was the machismo, I made the sacrifice, you better take it. That was the classic mood of the 1850's. And very slowly and very begrudgingly have women been respected in chess, and it's an ongoing battle. Chess to my mind is one of the last bass Christians of male chauvinism --

GK MOVE: 26 Qa4

MAURICE ASHLEY: We hadn't talked about this move, but this is a fork. It's a basic, basic primers, a fork. The queen is attacking the rook on e8 and the knight on c4. We need a move to deal with the double attack. A double attack is a very dangerous thing. You attack two things in this way and you might lose material. In the meantime, though, there is a response. We'll show you the red signals the attacked squares and here we can see the white queen is attacking this knight on c4 and the rook on e8. Those are two dangerous points. Black will be in need of a move in this position. It seems, though, that black has a very simple response to deal with this double attack and ma move is the move Rd8.

SUSAN POLGAR: It's a very nice trick, very nice sacrifice of the knight because the knight cannot be taken after the -- immediately of course the queen cannot take the knight, because the rook will take the rook. And if white inserts the exchange of rooks and takes now, then we've got checkmate all of the sudden with Qd1.

YASSER SEIRAWAN: That would wake everybody up! Wooo! That would be a 400-thousand-dollar mistake! (Audience laughter.) That could ruin your whole day! (Audience laughter.)

MAURICE ASHLEY: I don't think Garry would come back tomorrow after that. But one would have to suspect that Kasparov won't fall for that.

YASSER SEIRAWAN: The okey-doke.

MAURICE ASHLEY: And that Deep Blue should play the move Rd8. But in the meantime Deep Blue is thinking about the position. Certainly a move like Nd6 is not possible. You should point that out also, Yaz. Why don't you show the move Nd6 as an impossible try here.

YASSER SEIRAWAN: Well, in fact the move -- this is a situation where the double attack, Qa4 hits Nc4 and Re8. This is a situation where Nd6 cannot be played, and in fact Deep Blue has no choice but playing the move Rd8. So I'm sure Deep Blue had prepared the move Rd8, and since it's a forced move, Deep Blue hasn't yet played it, and the reason is it has three minutes to think about the move, and it's just anticipating many hundreds of millions of possible positions.

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