1. d2d4  1... d7d5  2. c2c4  2... e7e6  3. g1f3  3... g8f6  4. b1c3  4... c7c6  5. c4d5  5... e6d5  6. c1f4  6... c8f5  7. e2e3  7... b8d7  8. h2h3 This seemingly harmless system has already been played by many strong players, including Carlsen. With his last move, White, in addition to freeing a square back to the bishop on h2, prepares to play g4 and then possibly Nh4, capturing the bishop. 8... f8b4 This is probably not the most accurate, although it's certainly playable. 9. d1b3  9... d8b6  10. g2g4  10... f5g6  11. f3h4 [%c_effect h4;square;h4;type;GreatFind;persistent;true] 11... b4e7 A new move. The bishop returns to e7 anyway, so it's possible to say that his trip to b4 was not the best, but this is not a big deal. 12. h4g6  12... h7g6  13. f2f3 A typical move to take the e4-square from the knight and be able to take the king to f2. 13... d7f8 Maneuvering the knight to e6. 14. f4g3 