1. d2d4  1... d7d5  2. c2c4  2... d5c4  3. g1f3  3... g8f6  4. e2e3  4... e7e6  5. f1c4  5... c7c5  6. e1g1  6... b8c6  7. b1c3  7... a7a6  8. d4d5 A critical move and only the sixth most played. The game now enters tactical territory that, judging by the quality and speed of play, was known to both parties. 8... f6d5 An accurate move. 9. c3d5  9... b7b5 This is Black's idea. 10. c4b3  Both sides were playing very quickly. 10... c5c4  11. b3c4  11... b5c4 