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. 15... f8g7  16. c4e6  16... b6e6  17. a3a7 The black king is weak forever, and this is a horrific position to defend when short on time. 17... f5g3  18. h2g3  18... g7e5 Black follows the most forcing path. 19. d2e4  19... b7b6 But here the Chinese GM misses an important detail. 20. d1e1 A star move $1 The main threat is Ne4xc5 $1 with the total collapse of the opponent's queenside. 20... e6c6  21. e4d2 A second sudden retreat, and the knight is shifted to its optimal position. 21... e5b2 Better late than never. 22. c1b2  22... d8d2  23. e1e7  23... h8d8 In such positions the blunders occur naturally. 24. a7a6 Takes the b5-square under surveillance. 24... c8b8  25. h1h6 This is why the black rook should not have left its initial square $1 25... d2d6  26. h6d6  26... d8d6  27. e7f7  27... d6f6  28. f7h7 The rook is too active to be traded for free. 28... f6f8  29. a2a4 