An interesting idea. So wants to take the pawn to h5, gaining space, and then head the knight to f5 with Nh4. This pawn on h5 will be critical to White's victory, as we will see later.
1. e2e4  1... e7e5  2. g1f3  2... g8f6  3. f3e5  3... d7d6  4. e5f3  4... f6e4  5. d2d4  5... d6d5  6. f1d3  6... c8f5 This is a popular variation of the Petroff these days, being a specialty of super GM Duda, who played it in the candidates tournament. GM So also knows this line well, having scored an important victory with black against Niemann in the Sinquefield Cup with it. 7. e1g1  7... f8e7  8. f1e1  8... e8g8  9. b1d2  9... e4d6  10. d2f1  10... c7c6  11. c1f4  11... f5d3  12. d1d3  12... b8a6  13. f1e3  13... a6c7 Black's position is very solid but also quite passive. There are no weaknesses, but White's pieces are better developed, and it's easier for the first player to double rooks on the open e-file. Of course, at the elite level, players usually manage to defend this type of position, but for us mere mortals I think there are opening choices that lead to less suffering. 14. b2b3 The plan with c2-c4 is typical and poses some problems for Black. 14... c7e6  15. f4e5  15... f7f6 A new move. 16. e5g3  16... e6c7  17. c2c4  17... d8d7  18. e1e2 Another typical plan in this position. 18... f8e8  19. a1e1  19... e7f8 