1. d2d4  1... d7d5  2. g1f3  2... g8f6  3. e2e3  3... c7c5  4. d4c5 [%c_effect c5;square;c5;type;Interesting;persistent;true] By now we are used to queen's pawn sidelines in world championship matches. Both Ding and Ju showed that this is just as viable a path as fighting for advantage in the main lines. 4... e7e6  5. b2b4  5... a7a5  6. c2c3  6... a5b4  7. c3b4  7... b7b6  8. f1b5  8... c8d7  9. b5d7  9... b8d7  10. a2a4 