complicate tactics, a characteristic he attributed more to Tal. The book was first published in Denmark; an English-language version followed in 1970 and was sub-titled "Master of Counter-Attack". Larsen was one of seven top grandmasters who wrote chapters for the 1974 book How to Open a Chess Game. He edited the tournament book for San Antonio 1972. When Ken Smith played most of his games in that event with the white pieces using the Smith-Morra Gambit, Larsen quipped—after one of Smith's opponents responded to 1.e4 with 1...e6, entering a French Defence and avoiding the gambit—"stronger was c5, winning a pawn!" He also wrote the well-received Karpov Vs. Korchnoi: World Chess Championship, 1978, which was published within days of the match ending and was the first book in any language on the 1978 World Championship match. The Grünfeld Defence (1.d4 Nf6 2.c4 g6 3.Nc3 d5) was another opening that became a frequent choice of Larsen with the Black pieces, and similarly he placed considerable reliance on Grünfeld-Indian systems as White. This led him to co-author, with Steffen Zeuthen, a groundbreaking 1979 book on this opening titled Zoom 001 Zero Hour for Operative Chess Opening Models. Notable games Bent Larsen vs Boris Spassky, Amsterdam Interzonal 1964, Bird's Opening (A03), 1–0 Larsen successfully played unusual openings in this tournament, and here he uses one of them to knock off a top Soviet, on his way to winning the tournament. David Bronstein vs Bent Larsen, Amsterdam Interzonal 1964, King's Indian Defense: Averbakh. Benoni Defense Advanced Variation (E75), 0–1 Larsen defends and ends Bronstein's dream of becoming a World Championship Candidate. Svetozar Gligorić vs Bent Larsen, Zagreb 1965, Sicilian Defence, Scheveningen Variation (B83), 0–1 Gligorić launches a dangerous-looking attack, but Larsen finds an inspired defence. Larsen had a strong head-to-head dominance over the top Yugoslav player of that era. Bobby Fischer vs Bent Larsen, Santa Monica 1966, Ruy Lopez, Open Variation (C82), 0–1 Fischer has a promising position but miscalculates and is punished in drastic style by Larsen's counterattack. Bent Larsen vs Tigran Petrosian, Santa Monica 1966, Sicilian Defence, Accelerated Dragon Variation (B39), 1–0 Larsen unleashes a queen sacrifice to defeat the World Champion. Mikhail Tal vs Bent Larsen, Eersel 1969, match game 6, Sicilian Defence, Richter–Rauzer Variation (B65), 0–1 Larsen was dangerous with the Black pieces, and here he shows a former World Champion why. Mikhail Botvinnik vs Bent Larsen, Leiden 1970, Dutch Defense,