1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... f8b4  4. e2e3  4... e8g8  5. f1d3  5... d7d5  6. c4d5  6... e6d5  7. a2a3  7... b4d6  8. d1c2  8... c7c6 Instead both players are entering the Carlsbad pawn structure, with a white dark-squared bishop behind the pawn chain. 9. g1e2 Without the bishop, this seems the most sensible plan for So. He is preparing a kingside attack as soon as he can. 9... f8e8  10. c1d2  10... b8d7  11. f2f3 Botvinnik's plan, which is best met with 11... c6c5 Now the e3-e4 break is out of the question, but White can go for 12. h2h4 Or the immediate 12.0-0-0 which is a critical line as well. 12... h7h5 In the spirit of the Najdorf Sicilian $1 This move will either slow down the opponent considerable, or will add rocket fuel to his attack. It was a also a novelty, played after serious thought. 13. e1c1  13... a7a6  14. g2g4 Of course. In open files we trust. 14... h5g4  15. f3g4  15... f6g4  16. h4h5  16... d7f8 Covering the vital h7- and g6- points. 17. d1g1 The most obvious move is not the strongest here. 17... g4f2  18. d4c5 Again, the most obvious move is not ideal. 18... d6e5 Sevian immediately grabs his chance. The bishop is omnipresent in the center. 19. h5h6  19... g7g6 Thank you, Nf8 $1 20. h6h7  20... g8h8  21. h1h6  21... e5g7  22. h6h2  22... f2g4 Once more wonderful job by Sevian in the defense. The knight is in a hurry to get back to the center. 23. h2h3  23... g4e5 The bishop was perfect on this square, but the knight is even better $1 24. h3g3  24... f8e6  25. e2f4  25... e6f4  26. e3f4  26... e5d3  27. c2d3  27... d5d4 Black in complete control and quickly proves decisive advantage. 28. c3e4 