Vienna Variation by GM Delchev
GM Delchev presents a powerful Vienna Variation database. 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 dxc4 is a starting position for Vienna variation of Queen Gambit Declined. Fabolous line , used by famous players amongst them Kasparov, Anand , Karpov, Tal and Ribli. The most powerful score is of Armenian GM Levon Aronian , + 7 = 12.The database is a complete repertoire in the line by the theoretician GM Delchev.