1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... f8b4  4. g1f3  4... d7d6  5. d1c2  5... e8g8  6. c1d2  6... b7b6 [%c_effect b6;square;b6;type;GreatFind;persistent;true] A good and provocative move, allowing White to advance the pawn to e4. 7. e2e4  7... c7c5 [%c_effect c5;square;c5;type;GreatFind;persistent;true] The only way to justify Black's previous move. This must be accurately calculated or prepared. 8. a2a3  8... b4c3  9. d2c3  9... c5d4  10. f3d4  10... e6e5 [%c_effect e5;square;e5;type;GreatFind;persistent;true] If Black allows White to develop the pieces, then he manages to stabilize the game and has a lasting advantage thanks to the bishop pair and the space advantage. 11. d4f5 It's not clear that this is the best move. 11... c8f5  12. e4f5  12... b8c6  13. e1c1 [%c_effect c1;square;c1;type;GreatFind;persistent;true] 13... a8c8  14. c2d3  14... d8c7  15. d3d6 [%c_effect d6;square;d6;type;Inaccuracy;persistent;true] This is clearly wrong, since the endgame is very comfortable for Black. 15... c7d6  16. d1d6  16... f6e4 Black has clearly won the opening battle. 17. d6d7  17... e4c3 A difficult decision. Taking on f2 is also tempting. 18. b2c3  18... f8d8  19. d7d8  19... c6d8 [%c_effect d8;square;d8;type;GreatFind;persistent;true] The knight will be moved to c5. 20. f1e2  20... g8f8  21. h1d1  21... f8e7  22. d1d5  22... f7f6  23. c1c2  23... d8b7 Black's compensation for the pawn is more than enough, but the game should be drawn. 24. c2b3  24... b7c5  25. b3b4  25... c8d8  26. a3a4 [%c_effect a4;square;a4;type;Mistake;persistent;true] A clearly bad decision, since the pawn becomes a target. 26... c5e4 [%c_effect e4;square;e4;type;GreatFind;persistent;true] 27. f2f3 [%c_effect f3;square;f3;type;Mistake;persistent;true] Another inaccurate move. 27... a7a5 [%c_effect a5;square;a5;type;GreatFind;persistent;true] 28. b4b3  28... e4c5  29. b3a3 White's king has completely lost his mobility. If Black manages to activate his king, the position is easily winning. 29... d8d6  30. e2d1  30... c5a6 [%c_effect a6;square;a6;type;Inaccuracy;persistent;true] Preparing the maneuver that forces the exchange of rooks. 31. d1c2  31... a6c7  32. d5d6  32... e7d6  33. c2e4  33... c7a6  34. g2g4 [%c_effect g4;square;g4;type;Mistake;persistent;true] This move gives Black a breaking point. 34... a6c5  35. h2h4  35... h7h5 [%c_effect h5;square;h5;type;GreatFind;persistent;true] 36. g4h5  36... d6e7 White is in zugzwang. The bishop has to move, allowing e5-e4. 37. e4c6  37... e5e4 [%c_effect e4;square;e4;type;GreatFind;persistent;true] The third positional pawn sacrifice of the game. Brilliant play by Keymer. 38. f3e4  38... e7d6  39. c6d5  39... d6e5  40. d5c6  40... c5e4  41. c6e4  41... e5e4  42. a3b3  42... e4f5  43. c4c5 The last chance. 43... b6c5  44. b3c4  44... f5e4 [%c_effect e4;square;e4;type;Blunder;persistent;true] Unfortunately for him, Keymer doesn't take his magnificent game to its logical conclusion. 45. c4c5  45... f6f5  46. c3c4  46... f5f4  47. c5b6  47... f4f3  48. c4c5  48... f3f2  49. c5c6  49... f2f1q  50. c6c7 It's hard to believe at first glance, but this is a drawn position. The pawns on the a-file limit Black's queen mobility and provide a target for White should the queens be exchanged. 50... f1f5  51. b6b7  51... f5d7  52. b7b8  52... d7d6  53. b8b7  53... d6d7  54. b7b8 There is no winning plan for Black.