1. e2e4  1... c7c5  2. g1f3  2... d7d6  3. d2d4  3... c5d4  4. f3d4  4... g8f6  5. b1c3  5... a7a6  6. c1e3  6... e7e5  7. d4b3  7... f8e7  8. f2f3  8... c8e6  9. d1d2  9... h7h5  10. c3d5  10... e6d5  11. e4d5  11... b8d7  12. b3a5 [%c_effect a5;square;a5;type;Inaccuracy;persistent;true] This is a typical move in the Sicilian, as the knight can hardly be expelled with the move b6, thanks to the c6-square. But here Black has good counterplay. 12... d8c7  13. c2c4  13... e5e4 [%c_effect e4;square;e4;type;GreatFind;persistent;true] This is it. Black must play fast and bring the knight to e5. 14. f1e2  14... d7e5  15. f3f4 A difficult decision. I wouldn't hurry with this move. I prefer 15... e5g4  16. e3d4  16... e8g8  17. e1g1  17... f8e8  18. h2h3 [%c_effect h3;square;h3;type;Inaccuracy;persistent;true] This move is a mistake because Black naturally wants to play Nh6-f5. It's better to reinforce the knight's position on a5, taking that burden off the queen on d2. 18... g4h6 