Once upon a time, the Saemisch Variation terrorized the King's Indian Defense. Then GM Dzindzichashvili introduced a surprising resource for black, the c5 pawn sacrifice. This became an important mainline, adopted at the top levels up till now... GM Dzindzichashvili sadly returns to his own line to deal it its deathblow. This is extremely important opening theory for KID and Saemisch Variation players.
