1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... c7c5  4. d4d5  4... e6d5  5. c4d5  5... d7d6  6. e2e4  6... g7g6  7. f2f4  7... f8g7  8. f1b5 [%cal df1b5][%c_arrow f1b5;keyPressed;none;from;f1;opacity;0.8;to;b5;persistent;false] Historically this line has always been considered one of the most dangerous against the Benoni. 8... f6d7 It is firmly established in opening theory that this is the best way to cover the check. 9. a2a4  9... b8a6 Now and in the next moves Black can castle, which may lead to a transposition of moves. But Rapport has other plans. 10. g1f3  10... a6b4 This variant became famous due to Kasparov's analysis of his win against Nunn, published in the book The Test of Time, one of the best chess books ever written. 11. e1g1  11... a7a6 Kasparov attaches a question mark to this move and suggests 11...0-0. 12. b5d7 A direct continuation of the attack and a paradoxical move, as White normally doesn't want to exchange his light-squared bishop for a knight, further facilitating Black's development. The idea is to play f4-f5 next, when the absence of the knight in the defense can be felt. It's very difficult to say without deep analysis which move is better, whether this or bringing the bishop to c4 or e2.