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Deep Blue - Kasparov, 1997, Game 6The infamous Sixth game of the Deep Blue - Kasparov rematch, played May 11, 1997 was the last chess game in the rematch of 1997. It marked the first time that a computer had defeated a World Champion in a match of several games. This, as well as the fact that Kasparov had only lasted 19 moves in this game, attracted a lot of media attention, Before this game the score was tied at 2.5-2.5. Kasparov had won the first game, lost the second game (after resigning in a drawn position) and drawn games 3, 4 and 5 after having advantageous positions in all three. He was tired and dejected before this game. This is the game in algebraic notation. White: Deep Blue Black: Garry Kasparov 1.e4 c6 Somewhat untypically, Kasparov plays the solid Caro-Kann Defense, in later matches against computers he opted for 1...e5 . 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Ng5 Breaking one of the opening priciples ("don't move the same piece twice in the opening") but the idea is to put pressure on the weak f7 square. 5...Ngf6 6.Bd3 e6 7.N1f3 h6? Apparently, Kasparov got his opening moves mixed up. The upcoming sacrifice is well known to theory and Kasparov must have known about it, but he is tired and forgot to put in the usual precautionary 7...Bd6. 8.Nxe6! Actually it is not Deep Blue's fantastic skills which made it play this move, the knight sacrifice is programmed into the computer's opening book. 8...Qe7 Instead of taking the knight immediately, Kasparov pins the knight to the king in order to give his king a square on d8. However many annotators have criticized this move and said that Kasparov ought to have taken the knight immediately. 9.0-0 White castles so that 9...Qxe6?? loses to 10.Re1 pinning and winning the black queen. Black must now take the knight or he will be a pawn down. 9...fxe6 10.Bg6+ Kd8 11.Bf4 If Black's bishop were on d6 instead of f8, White would not be able to play this. For the sacrificed knight, White's bishops have a stranglehold on Black's position. Black, having moved his king, can no longer castle, his queen his blocking his own bishop, and he has trouble getting out his pieces and making use of his extra knight. 11...b5 The first new move of the game and Deep Blue must now start thinking on its own. Kasparov's idea is to get some breathing room on his queenside and prevent White from playing c4. 12.a4 Bb7 13.Re1 Nd5 14.Bg3 Kc8 15.axb5 cxb5 16.Qd3 Bc6 17.Bf5 White is pounding at Black's e6 pawn and is planning to invade the position with his rooks. Kasparov cannot hold onto all his extra material and desperately decides to surrender his queen for a rook and a bishop. 17...exf5 18.Qxe7 Bxe7 19.c4 Black Resigns It is a bit early to resign since it is not easy to find an absolutely clear win for White, but Kasparov has had enough and gives up without a fight.
Final position After the game Kasparov was in a foul mood and accused the Deep Blue team of cheating (i.e. having a team of human masters to aid the computer). Although Kasparov wanted another rematch, IBM declined and ended their Deep Blue program. Links
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