[%c_effect b4;square;b4;type;Interesting;persistent;true] A nice practical decision to simplify the game and remove one of the attacking bishops from the board.
1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... f8b4  4. e2e3  4... e8g8  5. f1d3  5... d7d5  6. c4d5  6... e6d5  7. g1e2  7... f8e8  8. e1g1  8... b8d7 [%c_effect d7;square;d7;type;Interesting;persistent;true] A rare move, involving a pawn sacrifice, that took Keymer by surprise. It's difficult to say whether this move was prepared in the laboratory or not. 9. d1b3 [%c_effect b3;square;b3;type;GreatFind;persistent;true] The critical move, which practically forces Black to sacrifice the d5-pawn. 9... b4d6 [%c_effect d6;square;d6;type;GreatFind;persistent;true] 10. c3d5 Taking up the gauntlet $1 10... f6d5  11. b3d5  11... d7c5 [%c_effect c5;square;c5;type;GreatFind;persistent;true] The best way to fight for the initiative. 12. d3h7 A natural move and a novelty. 12... g8h7  13. d5h5  13... h7g8  14. d4c5  14... e8e5 Black gets one of the pawns back. 15. h5f3  15... e5c5 White is a pawn up and has a good pawn structure, while Black has the bishop pair and a crazy attacking rook. 16. e2g3 [%c_effect g3;square;g3;type;GreatFind;persistent;true] A precise move. 16... c8d7  17. e3e4  17... d8h4 Bringing the queen to the game and avoiding 18.Bf4. 18. c1d2  18... c5b5  19. d2c3  19... a8e8  20. a1e1 The eternal question: which rook to play $2 Capablanca once advised wisely: think which rook is the most natural for you to move, and then play the other one. 20... b5g5  21. e4e5  21... d7c6  22. f3d3  22... d6c5 