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the rematch between [[Garry Kasparov]] and [[Deep Blue]], agreed after the [[Kasparov versus Deep Blue 1996]] match won by Kasparov with 4–2. The rematch took place in [https://en.wikipedia.org/wiki/New_York_City New York City], [https://en.wikipedia.org/wiki/New_York New York], May 3-11, [[Timeline#1997|1997]], and to a big surprise for most spectators Deep Blue won the rematch by 3½-2½ <ref>[https://researcher.watson.ibm.com/researcher/view_group.php?id=2942 IBM Research | Kasparov vs. Deep Blue: The Rematch - IBM]</ref>. Despite Kasparov's win of game 1 in a great style, he did not recover after the shock by Deep Blues' play in game 2, when Kasparov resigned a possibly drawn position after Deep Blue's 45. Ra6 <ref>[http://en.chessbase.com/post/komodo-8-deep-blue-revisited-part-one Komodo 8: Deep Blue revisited (part one)] by [[Albert Silver]], [[ChessBase|ChessBase News]], December 26, 2014</ref> <ref>[http://www.talkchess.com/forum/viewtopic.php?t=64627 Kasparov-Deep Thought 1997 (second game)] by Franco Kanizsa, [[CCC]], July 16, 2017</ref>. In the final decisive game 6, Kasparov seemed rather indisposed by either confusing the order of moves played 7...h6 in the [https://en.wikipedia.org/wiki/Caro-Kann_Defence Caro-Kann] with 7...h6 instead of knowing that it could provoke white to sacrifice a piece, which is very strong, but expected 7...Bd6Ne4, 8...assuming h6, or as suggested by was not in Deep Blue's [[Feng-hsiung HsuOpening Book|opening book]] <ref>[[Feng-hsiung Hsu]] ('''2002''')Kasparov says he played 7...h6 knowing that it could "provoke white to sacrifice a piece, which is very strong. ''[http://press.princeton.edu/titles/7342, But machines don't sacrifice a piece for a pawn without having a concrete outcome in sight, so I expected that the computer would go back on e4 because this move was not in the special database prepared by a grandmaster team that worked with Deep Blue.html Behind And to my horror Deep Blue: Building the Computer immediately took on e6, which means that Defeated the World Chess Champion]''move was already put in. "<br/>[https://en.wikipediachessbase.orgcom/wikipost/Princeton_University_Press Princeton University Presswhat-is-garry-up-to What is Garry up to?]</ref>, by playing a deliberate 'anti-computer' move as programs Kasparov was familiar with could not play the refutation properly <ref>[https://en.wikipediachessbase.orgcom/wikiauthor/Deep_Blue_versus_Kasparovmacauley-peterson Macauley Peterson],_1997,_Game_6 Deep Blue versus Kasparov[[ChessBase|ChessBase News]], 1997January 24, Game 6 - Wikipedia]2018</ref>. With hindsight the match was a huge advertisement and media hype for [[IBM]] rather than a "scientific" prove of machines supremacy versus humans in chess. Kasparov accused IBM of cheating and demanded a rematch <ref>[http://theweekinchess.com/html/twic270.html The Week in Chess Magazine: Open Letter] from [[Feng-hsiung Hsu]], January 10, 2000</ref>, but IBM declined and retired Deep Blue.