Commentary for black move 9: Strategically from the set up, if you just look at things, you know, just at the board for a moment, what is white trying to do? These two squares, the d5 and e4 squares are central to the strategy of controlling the center. The move Nf3-g5 controls the square e4 and opened up the Bg2. DB MOVE: 9...Bf5

MAURICE ASHLEY: We saw in game one, when Deep Blue had black -- it has now played the move Be6-f5 in response to Ng5. When Deep Blue had black in game one it went through virtual convulsions to prevent its light squared bishop from being exchanged for a knight. If you remember, in game one, the move Nh4 was played, preparing to get the bishop, and Deep Blue was willing to play a move g5, weakening its king in order to make sure and keep the bishop. Mike Valvo stated this before, and we hear it a lot. Computers love bishops. They prefer them over knights in almost any position, even blocked positions sometimes. They prefer bishops over knights. And they'll do anything to make sure a bishop -- almost anything to make sure a bishop is preserved from a capture by a knight, in a positional exchange.

YASSER SEIRAWAN: Now I know what Garry was thinking about, why Garry went into deep thought. I think that Garry was thinking about launching a mating attack.

MAURICE ASHLEY: Mate?

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