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Contributions to opening theory

Kasparov has made many contributions to opening theory. In the 1990s, he systematically developed new variants with computer programs. He also "reanimated" the Scotch Game in top-level competitions. Kasparov successfully used this opening, which was considered outdated, in the 1990 match against Karpov and in matches with Short and Anand. One of the offshoots of the Sicilian in the Szén Variation is called the Kasparov Gambit. Kasparov used this variation in the 12th and 16th games of the match with Karpov in 1985; in the second of these games, he scored a victory.

Another well-known case of winning an important game thanks to a novelty in the opening is Kasparov's 10th game of the 1995 match against Anand. On the 14th move, in a well-known position of the open variation of the Spanish Game (Ruy Lopez), Kasparov discovered a new idea with a rook sacrifice, which brought a decisive attack.

Kasparov has also co-authored several books on opening theory.