However, Deep Blue has not identified any threat of checkmate from Black, so it simply acquires the material.Ģ9. Nxb7 This is a very materialistic move, typical of computers White grabs an undeveloped pawn for a small gain in material. Qc5 Black was threatening 27.Qg5 forking g2 and the white rook.Ģ7. Keene suggests that 25.Rd8! 26.Qxb6 Rd7 was Black's best try, strengthening his passed d-pawn and queenside.Ģ6. Burgess suggests that 25.Ne7 26.Rxc8+ would have been better, though White would still have some advantage. b3! Kh8? Kasparov attempts to prepare a counterattack by preparing to move his rook to the g-file, but it will not work. Kasparov has been attacking White's d-pawn, and the computer wisely decides to advance it for an attack instead of trying to defend it.Ģ3. Kasparov commented that he might have played 23.d5 himself in this position, since it hurts Black's pawn structure and opens up the board, and Black's exposed king suggests that there is probably a way to exploit the result. d5! This type of pawn sacrifice is typical of Kasparov's style of play. Qe3! This is an excellent square for White's queen.Ģ2. The seemingly crushing move 31.Qf4 doesn't work, so Kasparov plays 31.Nd3 instead.ġ9. Note that Kasparov's king is now far more exposed. Qxf6? because White would gain material with 19.Nd7. Bg5 Black now has a problem with the pinned knight on f6.ġ7. After this move, the computer left its opening book and began calculating its moves.ġ1. If 11.Nc3 Qa5 12.Qb3 then the game transposes into a game Kasparov previously played against Kramnik. This was a new approach by Kasparov, developing the bishop in an unusual way. cxd4 Bb4 (see diagram) A more common move here is Be7. The IBM team determined the opening moves played by Deep Blue.Ģ. c3 It is more common to play 2.Nf3, but Kasparov has deep experience with that line, so White's opening book goes in a different direction.