The King's gambit is one of the oldest openings and leads to a sharp struggle from the first few moves. Bobby Fischer tried to refute it in the early 1960s but a few years later he was playing it himself. David Bronstein and Boris Spassky are other leading players who have been attracted by the opening's complexities. This revised and algebraicized edition of a book first published in 1974 aims to provide a complete system for the enterprising tournament player. The material has been updated to include master praxis of the last decade and it should prove especially useful for players who defend 1 e4 with 1...e5. Grandmaster Viktor Korchnoi, twice challenger for the World Championship, is one of the most combative and uncompromising players ever. Vladimir Zak was trainer of both Spassky and Korchnoi and is regarded as an authority on the King's gambit.