1. e2e4  1... c7c6  2. d2d4  2... d7d5  3. b1c3  3... d5e4  4. c3e4  4... c8f5 The solid Caro-Kann. 5. e4g3  5... f5g6  6. h2h4  6... h7h6  7. g1f3  7... b8d7  8. h4h5  8... g6h7  9. f1d3  9... h7d3  10. d1d3  10... e7e6  11. c1d2  11... g8f6  12. e1c1  12... f8e7 Players now tend to castle short in the Caro-Kann. The dangers  of checkmates have been carefully checked by the machines, and they  apparently approve the way that the second player goes. 13. c1b1  13... e8g8  14. g3e4  14... c6c5 And Duda sank into deep thought. More than half an hour was  spent on his clock, while the commentators were contemplating the reason  for the thinking. Ultimately they came to the conclusion that he is not  certain about his opening knowledge. 15. d2e3 A very risky choice, called "very passive" by Firouzja.