Kuzmin: The Zaitsev System Vereinsbedarf Black can prevent the formation

Black can prevent the formation of a strong white pawn center e4/d4

the World match in Belgrade in 1970

but immediately lost the title to Botvinnik

goes on the counterattack - usually with the help of an effective expansion on the queenside through c7-c6 and b7-b5

The Spectator:

Kuzmin: The Zaitsev System Vereinsbedarf Black can prevent the formationFresh Ideas and New Weapons for Black in the Ruy Lopez The Zaitsev System is one of the most dynamic setups for Black in the ever popular Ruy Lopez chess opening. When Alexey Kuzmin joined the coaching staff of World Champion Anatoly Karpov in the 1980s he started analyzing the Zaitsev System, and later continued his investigations as a second of Alexander Morozevich. For this book he has updated and improved his analysis and found countless