1. c2c4  1... e7e5  2. b1c3  2... g8f6  3. g1f3  3... b8c6  4. e2e3  4... f8b4  5. d1c2  5... e8g8  6. c3d5  6... f8e8  7. c2f5  Quite a sharp opening choice by Duda, and excellent for blitz and rapid  chess. 7... d7d6  8. d5f6  8... g7f6  9. f5h5 White managed to destroy the  opponent's kingside but at the expense of a big delay with his  development. Therefore, Carlsen classically strikes in the center. 9... d6d5  10. a2a3  10... b4f8  11. f1d3  11... e5e4  12. c4d5  12... e4d3 