1. d2d4  1... e7e6  2. c1f4  2... c7c5  3. e2e3  3... d8b6 As Tang explained in his short post-game interview, he does not have the time for extensive home preparation, and his openings are not as top-notch as those of his opponents. Therefore, he is only hoping to get \"a game\" out of the opening, not necessarily an advantage. Here too, as early as on move four, he is deep into the think tank, contemplating what his opponent might have prepared. 4. b2b3 That's what Black hopes for when hopping with the queen to b6—that White's queenside will be weakened. 4... g8f6  5. c2c3  5... b8c6  6. g1f3  6... f6h5  7. f4g5  7... d7d5  8. b1d2  8... h7h6  9. g5h4 So far so good for Swiercz— he does not have any problems out of the opening. He might even start thinking about the advantage himself, but there is something that Tang can be happy about-his opponent is out of prep. 9... c5d4 A novelty. 10. f3d4  10... h5f6  11. h4g3  11... f8e7 Simply proceeding with development. 12. f1e2  12... e8g8  13. e1g1  13... c8d7  14. d1c2 The queen side-steps the opponent's rooks. 14... a8c8  15. c2b2  15... c6d4 Now Swiercz takes, but Tang has an extra choice. 16. e3d4 [%c_effect d4;square;d4;type;GreatFind;persistent;true] The correct recapture. 16... d7b5 [%c_effect b5;square;b5;type;GreatFind;persistent;true] This same idea is good here as well. 17. e2b5  17... b6b5  18. a2a4  18... b5a5  19. f1c1 White starts to prepare for queenside expansion. A complicated Carlsbad pawn structure has emerged, in which both sides have something to be happy about. Black-that he's swapped off his light-squared bishop. White-that he's stopped the minority attack with b7-b5 $1 19... f8d8  20. c1c2 More preparation is needed. 20... a5a6  21. a1c1  21... f6h5  22. g3e5  22... e7g5  23. c1e1  23... h5f4  24. e5f4  24... g5f4  25. d2f3  25... a6d3 Swiercz is sending his queen to the kingside, anticipating an attack, but this might also help White. 26. h2h3  26... d8d7  27. f3e5 