1. c2c4  1... e7e6  2. b1c3  2... d7d5  3. d2d4  3... g8f6  4. c4d5  4... e6d5  5. c1g5  5... c7c6  6. e2e3  6... c8f5  7. d1f3  7... f5g6  8. g5f6  8... d8f6  9. f3f6  9... g7f6 An important endgame that has occurred in many Queen's Gambit Declined games. Black has a poor pawn structure, but it's unclear whether White can exploit the weaknesses to gain an advantage. 10. g1f3  10... b8d7  11. f3h4  11... d7b6  12. f1e2  12... f8e7  13. g2g3  13... b6c4  14. e2c4 A new move. 14... d5c4  15. e3e4 White's idea is to play f3, castle queenside, maneuver the knight to f4, and then push the central pawns. 15... b7b5  16. f2f3  16... h7h5 [%c_effect h5;square;h5;type;Inaccuracy;persistent;true] This move doesn't seem right. Black has a good position after 17. e1c1  17... a8d8  18. c3e2  18... h8g8  19. e2f4 White has completed his plan and is ready to play Rhe1 followed by e4-e5 or d4-d5. Andreikin tries to confuse his opponent. 19... f6f5 [%c_effect f5;square;f5;type;Interesting;persistent;true] 20. e4f5 [%c_effect f5;square;f5;type;Inaccuracy;persistent;true] 20... e7h4  21. g3h4  21... g6f5  22. h1e1  22... e8f8  23. e1e5  23... f5d3 [%c_effect d3;square;d3;type;GreatFind;persistent;true] Andreikin defends very well. 24. f4d3  24... c4d3  25. d1d3  25... g8g2 Black has enough activity to equalize the game. 26. e5h5  26... g2h2 [%c_effect h2;square;h2;type;Inaccuracy;persistent;true] 27. d4d5 [%c_effect d5;square;d5;type;Inaccuracy;persistent;true] 27... c6d5 [%c_effect d5;square;d5;type;Mistake;persistent;true] A blunder. 28. h5h8 [%c_effect h8;square;h8;type;GreatFind;persistent;true] 28... f8e7  29. h8d8  29... e7d8  30. d3d5  30... d8e8 This leaves the queenside unprotected, but the game also cannot be saved after 31. d5b5  31... h2h4  32. b5b8  32... e8e7  33. b8b7  33... e7e6  34. b7a7  34... h4h1  35. c1c2  35... h1h2  36. c2c3  36... h2f2  37. a7a6  37... e6e5  38. a6a5  38... e5f4  39. b2b4 [%c_effect b4;square;b4;type;GreatFind;persistent;true] White's pawns are much faster than Black's lonely warrior. 39... f2f3  40. c3c4  40... f3f1  41. b4b5  41... f1b1  42. c4c5 