Carlsen wants his bishop on the diagonal.
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... g8f6  4. d2d3 Not yet an endgame with you, Mr  Carlsen. 4... f8c5  5. b5c6  5... d7c6  6. e1g1  6... c8g4 The most annoying reply for the first player. Once that he  castled, he needs to think twice if he really wants to break the pin with  the g2-g4 move. 7. h2h3  7... g4h5  8. b1d2  8... f6d7  9. d2c4  9... f7f6  10. a1b1 A  novelty which intends to dispatch the black bishop from the a7-g1  diagonal.