A pet sacrifice of the prominent GM Gligoric. The KID guru clearly understood the value of his dark-squared bishop and was not shy of giving up two pawns for setting it out of his prison cell.
1. c2c4  1... g8f6  2. g1f3  2... g7g6  3. b1c3  3... f8g7  4. e2e4  4... d7d6  5. d2d4  5... e8g8  6. f1e2  6... e7e5  7. d4d5 The  Petrosian system which was successfully revived by Vladimir Kramnik. 7... a7a5  8. c1g5  8... h7h6  9. g5h4  9... b8a6  10. f3d2  10... c8d7  11. a2a3  11... d8e8  12. g2g4 One of the key points behind this positional system.  Anton wants to lock the kingside. 12... a5a4  13. f2f3  13... h6h5  14. h1g1  14... h5g4 A novelty. 15. f3g4  15... f6h7 Firouzja, on his turn, regroups his pieces on the kingside. 16. d1c2  16... a6c5  17. e1c1  17... g7h6  18. g4g5 Otherwise the bishop will come in  front of the pawns and Black will have good game. 18... e8e7 As usual  in chess you gain something in return for something else. Black forces the defensive move: 19. d2f3 Which clears the queenside knight's road to the  center after: 19... c5b3  20. c1b1  20... h6g7  21. h4f2  21... b3d4  22. c2d2 White is  happy with the status quo and does not want to open the game yet. 22... d4e2  23. d2e2  23... f7f5 The only chance of counterplay. 24. f2e3  24... f5e4 In conjunction with Black's next move this is the only  way to play the position! 25. f3d2 