Benoni - classical with ...a6 and 10...Bg4
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O a6 10. a4 Bg4
White pushes the queen's pawn to d4. Black develops the knight to f6. White moves the c-pawn to c4.
Black pushes the c-pawn to c5. White plays the queen's pawn to d5. Black moves the king's pawn to e6.
White develops the knight to c3. Black captures on d5 with the king's pawn. White captures on d5 with the c-pawn.
Black moves the queen's pawn to d6. White plays the king's pawn to e4. Black advances the g-pawn to g6.
White moves the knight to f3. Black develops the dark-squared bishop to g7. White develops the light-squared bishop to e2.
Black castles kingside. White castles kingside. Black moves the a-pawn to a6.
White plays the a-pawn to a4. Black moves the light-squared bishop to g4.