1. g2g4 A good positional move and a radical way of understanding that it can be useful to advance a pawn before developing the knight. 1... h8g6 Premature development of the knight, which can be subjected to a rapid attack. 2. a1b3  2... e7e5 Controlling the center, but leaving f5 somewhat weakened. 3. h1g3  3... f7f6  4. c2c4  4... d8c8  5. d2d4  5... a8b6  6. d4d5 White now has a large space advantage. 6... d7d6  7. b1f5  7... e8d7  8. f2f3  8... a7a6  9. e2e4  9... g6f4  10. f5d7  10... d8d7  11. d1c2  11... b8a7  12. e1d2 The right way to move the bishop to the g1-a7 diagonal. 12... c8b8  13. d2e3  13... f4h3  14. g1g2  14... h3f4  15. g2f2  15... h7h5 Searching for activity with Qh7. 16. f1d1  16... h5g4  17. f3g4  17... b6c8  18. c4c5  18... d6c5  19. e3c5 The position is still unpleasant for Black. 19... g7g6 Controlling the f5-square and freeing the seventh-rank for the defense. 20. c5a7  20... c8a7  21. c2b1 We have a normal chess position again, with all the patterns we are used to in conventional chess. 21... g8h7  22. b3c5  22... d7d6  23. g3e2 Now Black will be able to activate the knight on a7 and achieve counterplay. 23... f4e2  24. f2e2  24... a7b5  25. e2c4  25... f8c8  26. a2a4  26... b5d4  27. g4g5 Keymer finds a very good practical chance to pose problems. 27... c8d8  28. g5f6  28... d6f6 The e5-pawn is weakened, but Black has enough activity to keep the game equal. 29. d1f1  29... f6b6  30. f1f2  30... g6g5  31. b1a2  31... b8a7  32. c1f1  32... g5g4 Now it's too late-this move is a blunder. 33. c4c3 Returning the favor. 33... d4f3 Closing the f-file.