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Kasparov played specifically against the machine, taking it out of its book even at the expense of best play, and attempting to keep the game under control throughout.
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The first game of the 1997 rematch was one that had to remind players of the rout from the previous year when the world champion had dominated the computer with a 4-2 win, and a demonstration of prevailing human superiority. Sadly these transcripts only cover the early opening phase since after that the live commentary files are blank. The site does not merely include the complete computer moves and analysis, but also all the live commentary made at the time by Maurice Ashley (who was not a GM yet), IM Mike Valvo and GM Yasser Seirawan among others. IBM has several spaces dedicated to Deep Blue, one of its great successes, some recounting the project and history, and also the replayable games with complete notes. Revisiting some key moves of the games will not only shed light on how the evaluations have held up to time, but the progress that has been made since then. We can thus see what a top grandmaster thought of the decisions in the game, added to the evaluations and analysis of Deep Blue itself, and compare them to what a top modern engine thinks of it. In Mega 2015 we can also find the deep annotations of the games by GM John Nunn, who weighed in with his usual precision and circumspection. The files were as complete and detailed as one could want, and two versions were published at the IBM website: the unedited digital diarrhea with all the data it produced per move, and a cleaned up version that made the more relevant parts readily legible, such as the depth, nodes (positions) analyzed, evaluation, and main line. In 2000, a few years after Deep Blue had been irrevocably mothballed, and the talk of a rematch had definitively been put to rest, IBM released the complete computer logs of the games available for any and all to consult. These aren't idle claims and are easily verifiable even without actually running such a match. It wasn't today, nor even yesterday, honesty compels me to say, and the exact 'when' is up to debate, but there is no question that today, when a user loads up an engine such as Komodo 8 on his desktop, and or even on a modern quad-core smartphone, they are consulting a chess engine that would beat Deep Blue quite handily were they to bump heads today. It was literally the clash of the titans as Garry Kasparov faced IBM's monster After the anti-climactic game six that ended the match in its favor, there wasn't a player alive who did not secretly wish they had their own private Deep Blue to consult. A number of the moves played by the chess supercomputer were completely different from the usual brute force play that players had come to associate with computers, reminiscent of genuine grandmaster decisions. After five of the six games, the score was tied up 2.5-2.5, but already there were changes in the air. The match was being followed all over the world, with media coverage befitting the football World Cup, and rather innovatively at the time: on the internet in real time. In 1996, he had played IBM's supercomputer and beat it comfortably in a high profile match, and the blue chip company made its goal to defeat him, investing tens of millions of dollars in exclusive research and development, dedicated hardware that had no other purpose than to play chess, and top grandmasters as consultants. Garry Kasparov, one of the most dominant champions in history, including a record fifteen consecutive tournament wins, was playing Deep Blue for the second time.