1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. e3 g6 6. Nc3 Bg7 Black developps his kingside and prepares ...d6 or ...e6 7. Nf3 O-O 8. a4 White will be able to recapture on b5 with the pawn making the development of Black's queenside rather difficult,theplan 8... e6 Black counters with ... e6 , remove the pawn on d5 and occupation of the centre by ...d5 8... Bb7 9. Ra3 axb5 (9... e6 10. dxe6 fxe6 11. Qd6 main line) 10. Bxb5 e6 11. dxe6 fxe6 12. Qd6 Bxf3 13. gxf3 Qc8 14. O-O Ne8 15. Qg3 d5 16. Bxe8! black knight is more important 9. dxe6 fxe6 10. Qd6 Black will be forced to waste time with ...Ne8 and ...Qc8 to expel the white queen . White will lose a tempo retreating the queen but the time lost by Black regrouping his pieces is more significant 10... Bb7 10... axb5 11. Bxb5 Na6 12. e4 Ne8 13. Qg3 Nb4 14. O-O 11. Ra3 11. Qxc5 line combative but also riskier 11... axb5 (11... Ne4 12. Nxe4 Bxe4 13. Qb4 Bxf3 14. gxf3 axb5 (14... Rxf3? 15. Bg2) 15. Bxb5 Nc6 16. Qe4 Rc8) 12. Bxb5 Ne4 13. Nxe4 Bxe4 14. Qc4 Bxf3 15. gxf3 Nc6 16. Qe4 (16. Bxc6 Rc8 17. Bxd7 Rxc4 18. Bxe6+ Kh8 19. Bxc4 Rxf3) 16... Rc8 17. f4 Qe7 11. Be2 axb5 12. Bxb5 Qc8 13. O-O Ne8 14. Qg3 Bxf3 15. gxf3 Nc6 16. Bd2 d5 Black has obtaininig controle of the centre 11... Qc8 11... Bxf3 12. gxf3 Qc8 13. f4 Ne8 14. Qd1 axb5 15. Bxb5 Nc7 16. Be2 d5 17. h4 11... Ne4?! 12. Nxe4 Bxe4 13. Bd3 Bxd3 14. Qxd3 d5 15. b3 axb5 12. Be2 axb5 13. axb5 Ne8 14. Qd2 d5 15. Rxa8 Bxa8 16. O-O the lines where the white kingside is broken up after Bxf3 are more incisive for Blacks