[Event "URS-ch38 Final"] [Site "Riga"] [Date "1970.12.05"] [Round "7"] [White "Liberzon, Vladimir Mikhailovi"] [Black "Karpov, Anatoly"] [Result "1/2-1/2"] 1. c4 c5 2. Nf3 Nc6 3. Nc3 g6 4. e3 Nf6 5. d4 Bg7 6. d5 Na5 7. Be2 d6 1/2-1/2