Chess Legends
Garry Kasparov, Deep Blue, and the Day Chess Changed Forever
How Garry Kasparov ruled chess for two decades, beat Deep Blue in 1996, lost the 1997 rematch, and rewrote how professionals prepare openings.
On May 11, 1997, in a conference room on the 35th floor of a Manhattan skyscraper, Garry Kasparov resigned game six of his rematch against IBM’s Deep Blue after nineteen moves. The whole game lasted about an hour. The reigning world champion — the strongest human player alive — slammed his hand on the table, stood up, and walked out. A machine had won a classical match against the best player on the planet, 3½ to 2½. Chess, and a lot of assumptions about the human mind, would never look the same.
From Baku to the top of the rating list
Kasparov was born on April 13, 1963, in Baku, then part of the Soviet Union. He came up through the Soviet chess machine, trained in part by former world champion Mikhail Botvinnik, and moved through the ranks with a speed that alarmed the older generation. His style was aggressive from the start: sharp openings, early initiative, and a willingness to sacrifice material for an attack that most players would never risk against elite opposition.
His pursuit of the title against Anatoly Karpov became one of the strangest sagas in sports. Their first match, in 1984–85, ran an exhausting 48 games before FIDE controversially halted it with no result. They played again later in 1985, and this time Kasparov won the 24-game series to take the crown. At 22, he became the youngest undisputed world champion in history — a record that stood until 2024.
Twenty years at number one
What followed was a stretch of dominance almost without parallel. Kasparov held the world number one ranking for a record 255 months and reached a peak Elo of 2851, a figure that stood as the highest ever recorded until Magnus Carlsen surpassed it years later. He defended the title against Karpov again and again through the late 1980s, and the two remain, by many measures, the greatest rivalry the game has produced.
In 1993 he blew up the sport’s politics. Frustrated with FIDE’s handling of prize funds and match logistics, Kasparov and his challenger Nigel Short broke away and staged their title match under a new body, the Professional Chess Association. FIDE stripped Kasparov of its version of the title and crowned its own champion. For the first time, the chess world had two rival world champions at once — a schism that lingered until reunification in 2006.
The machine that arrived a year late
The Deep Blue story is usually remembered as one match, but there were two. In February 1996, in Philadelphia, Deep Blue actually won the opening game — the first time a computer beat a reigning world champion at classical time controls. Kasparov steadied himself, adjusted his approach to steer the machine into positions it understood poorly, and won the match 4–2. The human still ruled.
IBM went back to work. The 1997 rematch in New York featured a far stronger machine, roughly doubled in speed and refined by a team of engineers and grandmaster consultants between games. Kasparov won game one. Then came game two, where Deep Blue played with a positional restraint so unmachine-like that Kasparov suspected human intervention. He never fully recovered his composure. After a string of draws, the collapse in game six ended it.
I could feel — I could smell — a new kind of intelligence across the table.Garry Kasparov, reflecting on his match against Deep Blue
The result was less a verdict on Kasparov than a marker in time. Raw calculating power, applied to a game long treated as a summit of human intellect, had caught up. Within a decade, the strongest engines running on ordinary laptops would leave every human far behind, and the interesting question shifted from “can machines beat us” to “what can we learn from them.”
How he changed professional preparation
Kasparov’s deepest influence may be something you can’t see on a highlight reel: opening preparation. He treated opening theory as a research program, memorizing and refining lines dozens of moves deep and springing prepared novelties on opponents who had no answer over the board. He was among the first elite players to fold computer analysis into that work, using engines and databases to test ideas at home before ever sitting down to play.
That approach reset the standard for what it means to be a professional. Today every serious tournament player, from candidates hopefuls to club competitors, prepares with engines and databases as a matter of routine — a habit Kasparov did as much as anyone to normalize. When he retired from competitive chess in 2005, still ranked number one, he left behind not just a trophy case but a template for how the modern game is studied.
The legacy on the board
Kasparov’s games remain a masterclass in the initiative — the art of keeping your opponent reacting to threats until the position cracks. His attacking wins, his marathon battles with Karpov, and his two encounters with Deep Blue are still among the most instructive material any improving player can study. Analyze them move by move and you see the same thread: relentless pressure, deep preparation, and an unwillingness to settle for a quiet draw.
If those games make you want to test your own attacks against a live opponent, that’s the fun part — you can play a rated game on ChessTrophies and start climbing your own way up the board.