context: 1. e2e4  1... c7c5  2. g1f3  2... e7e6  3. d2d4  3... c5d4  4. f3d4  4... a7a6 The flexible Kan Sicilian... 5. c2c4 ...which will soon turn into a Hedgehog. 5... g8f6  6. b1c3  6... d8c7  7. a2a3  7... b7b6  8. c1e3  8... c8b7  9. f2f3  9... f8e7  10. f1e2  10... d7d6  11. e1g1  11... e8g8  12. a1c1  12... b8d7  13. b2b4 A tabiya for the system. In an ideal world White is preparing Nd4-b3 and the advance of the a-pawn, when c4-c5 will follow. 13... a8c8  14. d1d2  14... f8e8  15. d4b3  15... c7b8  16. f1d1  16... h7h5 Spike to the left $1 A well-known aggressive-positional approach that intends to fix some weaknesses on the dark squares. 17. e3f4  17... d7e5 