King's Indian - Petrosian system - Stein variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 a5
White pushes the queen's pawn to d4. Black develops the knight to f6. White pushes the c-pawn to c4.
Black plays the g-pawn to g6. White develops the knight to c3. Black develops the dark-squared bishop to g7.
White plays the king's pawn to e4. Black advances the queen's pawn to d6. White jumps the knight to f3.
Black castles kingside. White develops the light-squared bishop to e2. Black moves the king's pawn to e5.
White moves the queen's pawn to d5. Black moves the a-pawn to a5.