1. e2e4  1... c7c5  2. g1f3  2... d7d6 Duda is not afraid to enter the sharp Sicilian lines. 3. f1b5 Whereas Carlsen prefers a more positional approach. 3... c8d7  4. b5d7  4... d8d7  5. e1g1  5... g8f6  6. d1e2  6... b8c6  7. c2c3  7... e7e6  8. d2d4  8... c5d4  9. c3d4  9... d6d5  10. e4e5 