Ebook: El Sacrificio Posicional de Calidad

Tbilisi: University of Tbilisi, 1982. — 15 p.A lecture given by Petrosian describing his techniques of defence and attack by the positional sacrifice of Rook for Bishop plus compensation (such as the pair of Bishops, central squares for his Knights , a central pawn , a piece out of play or a pawn position in which the opposing rooks do
not have open lines.)
Petrosian has here written an additional chapter to "My System" by Aron Nimzowitsch.