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Kasparov cannot hold onto all his extra material and must surrender his queen for a rook and a bishop.ġ7. Bf5 White is pounding at Black's e6-pawn and is planning to invade the position with his rooks. a4 Bb7 Keeping lines closed with 12.b4 was mandatory according to Keene, but then 13.c4 would cramp Black's game.ġ3. However, this move has been marked as a mistake by Schwartzman, Seirawan, and Rajlich as it weakens the queenside pawn structure and invites White to open lines.ġ2. Kasparov's idea is to get some breathing room on his queenside and prevent White from playing c2-c4. b5? The first new move of the game and Deep Blue must now start thinking on its own. Black, having moved his king, can no longer castle, his queen is blocking his own bishop, and he has trouble getting out his pieces and making use of his extra knight.ġ1.
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For the sacrificed knight, White's bishops have a stranglehold on Black's position. Bf4 (see diagram) If Black's bishop were on d6 instead of f8, White would not be able to play this. Black must now take the knight or he will be a pawn down.ĩ. 0-0 White castles so that 9.Qxe6? loses to 10.Re1, pinning and winning the black queen. Although the black king uses two moves to reach d8 after 8.fxe6 9.Bg6+ Ke7, the black queen can be placed on the superior c7-square.ĩ. However, many annotators have criticized this move and said that Kasparov ought to have taken the knight immediately. Qe7 Instead of taking the knight immediately, Kasparov pins the knight to the king in order to give his king a square on d8. As an indication of how far computer chess has progressed in recent years, modern chess programs running on ordinary desktop computers do find Nxe6 without their opening books.Ĩ. The compensation White gets for the material is not obvious enough for the computer to see by itself. However, had Deep Blue been on its own, it would probably not have played this.
#Deep blue chess game 6 plus#
This move had been played in a number of previous high-level games, with White achieving a huge plus score. Nxe6! The computer is aided by having this knight sacrifice programmed into its opening book. So Hsu suggests that Kasparov expected that Deep Blue would either sacrifice the knight and then get into difficulties, or retreat it and lose a tempo.Ĩ. Several were specifically forbidden from playing Nxe6, because they lost too easily. White's response is very strong, but the computer programs Kasparov was familiar with could not play it properly. Objectively speaking, the move may be okay, although the resulting position is very tough for a human player to defend as black. Feng-Hsiung Hsu, the system architect of Deep Blue, suggests that it was a deliberate 'anti-computer' move by Kasparov. The upcoming sacrifice is well known to theory and Kasparov must have known about it (in fact, there are some reports that he even wrote an article supporting 8.Nxe6 as a refutation). The normal 7.Bd6 8.Qe2 h6 9.Ne4 Nxe4 10.Qxe4 was played in Kasparov(!)-Kamsky, 1994 and Kasparov-Epishin, 1995, among other games. It has been suggested that it was a blunder and Kasparov got his opening moves mixed up, playing. N1f3 h6? (see diagram) A strange choice by Kasparov, one of the most theoretically knowledgeable players in chess history. Kasparov had played this move himself as White at least three times earlier.ĥ. Ng5 (see diagram) This relatively recent innovation breaks one of the classic opening principles ("don't move the same piece twice in the opening"), but puts pressure on the weak f7-square. In later matches against computers he opted for 1.e5 or 1.c5, the sharp Sicilian Defence, Kasparov's usual choice against human opponents.Ģ. e4 c6 Somewhat atypically, Kasparov plays the solid Caro-Kann Defense.