1. d2d4  1... g8f6  2. g1f3  2... d7d5  3. c1f4 An unexpected opening choice by Duda, at least for his opponent. 3... g7g6  4. e2e3  4... f8g7  5. f1e2  5... e8g8  6. b1d2  6... c7c5  7. c2c3  7... b7b6 \"I knew this line is playable. Black accepts a slightly worse position.\" (Caruana) 8. f3e5  8... f6d7  9. h2h4 A very straightforward and logical attempt, but Black was not too worried about it. 9... d7e5 