The Russian Variations (4 Nf3 Bg7 5 Qb3) have become a popular weapon against the Gruenfeld Defense. Anatoly Karpov used it very successfully in the 1986 World Championship match, when all other methods were failing to achieve an advantage against Kasparov's stubborn resistance. In this substantial revision of his 1985 book, Eric Schiller provides a complete repertoire against the Gruenfeld, based on the 5 Qb3 lines but also including lesser known variation with the idea of Qd1-b3. The variations are illustrated by many complete games, including 15 fully annotated examples.