1. e2e4  1... c7c5  2. g1f3  2... b8c6  3. b1c3 In a must-win situation, Carlsen follows the  advice of Sveshnikov and rejects the main lines. 3... e7e5  4. f1c4  4... f8e7  5. d2d3  5... g8f6  6. e1g1  6... e8g8  7. c3d5 