1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... g8f6 Carlsen follows the golden rule of the  experienced player: "an endgame with the youth." 4. d2d3 But the Berlin  Endgame is rejected. 4... d7d6  5. c2c3  5... a7a6  6. b5a4  6... f8e7  7. e1g1  7... e8g8  8. f1e1  8... f8e8  9. b1d2 