1. d2d4 After yesterday's defeat the Chinese GM decided to try something  completely different. 1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... f8b4  4. g1f3  4... d7d5  5. d1b3  5... c7c5  6. d4c5  6... b8a6  7. c4d5  7... f6d5  8. c5c6 Yu is fully prepared for the game and uncorks a  novelty. 8... d8a5  9. c1d2  9... b7c6  10. g2g3  10... d5c3  11. b2c3  11... b4e7  12. f1g2  12... e8g8  13. e1g1  13... e6e5  The position is deceptively harmless for the second player. White's  Catalan bishop is always a monster whereas the queen can find a path to  the enemy weaknesses. 14. b3c2 An excellent idea. The queen is  restricting the activity of the black pieces. 14... a5c7  15. c2e4  15... f7f6  16. e4c4 Now that the black queen is back, the white one moves to a better position. 16... g8h8  17. d2e3  17... a6b8 So cannot tolerate his  poor knight and tries to relocate it. In the process, he frees the a6-f1  diagonal for his bishop.