1. e2e4  1... e7e5  2. f1c4  2... g8f6  3. d2d3  3... b8c6  4. b1c3 Nepomniachtchi has been extremely  successful in reviving this old Vienna line. 4... f8b4 This should not  have come as a surprise for Nepomniachtchi as Giri used the line twice  recently to hold on against strong opposition. 5. g1f3  5... d7d6  6. e1g1  6... b4c3  7. b2c3  7... c6a5  8. c4b3  8... h7h6  9. h2h3  9... d8e7  10. f3h2 With the clear intention of f2-f4! 10... a5b3 Black has an  aggressive idea in mind. 11. a2b3  11... g7g5 The point. Giri hopes he can block the opponent's kingside  play. It is not clear though where he intends to hide his king, especially with the half-opened a-file against his potential queenside castle. 12. f1e1 Nepomniachtchi makes immediate use of the weakness of the f5-spot and sends his knight there.