context: 1. d2d4  1... g8f6  2. g1f3  2... d7d5  3. c1f4 When in London... 3... c7c5  4. e2e3  4... b8c6  5. b1d2  5... f6h5 A very concrete attempt to solve the London problem. 6. f4g5  6... h7h6  7. g5h4  7... g7g5  8. f3e5  8... c6e5  9. d4e5  9... h5g7  10. h4g3  10... d8b6 All of this is more-or-less forcing and now Abdusattorov comes up with a novelty. 11. d1f3  11... c8e6  12. e1c1  12... e8c8 Here and on the next move it might have been a good idea for Wei to insert the moves h6-h5 and h2-h3, thus softening the white kingside. 13. e3e4  13... d5e4 All of this is very logical, but now White has an extra and unpleasant choice. 14. f3a3 With the dark-squared bishop stuck on f8, this queen swing looks extremely unpleasant for Black. He has very concrete problems to solve. 14... g7f5  15. f1c4 The key point behind White's strategy. He is about to challenge the black queen.