Gruenfeld - Opovcensky variation
1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Bd2
White advances the queen's pawn to d4. Black develops the knight to f6. White plays the c-pawn to c4.
Black advances the g-pawn to g6. White develops the knight to c3. Black moves the queen's pawn to d5.
White moves the knight to f3. Black develops the dark-squared bishop to g7. White advances the king's pawn to e3.
Black castles kingside. White develops the dark-squared bishop to d2.