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 