1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... a7a6  4. b5a4  4... g8f6  5. e1g1  5... f8e7  6. f1e1  6... b7b5  7. a4b3  7... e8g8 This variation is Carlsen's main weapon as Black and the one he used in his last world championship match against Nepomniachtchi. Interestingly, in the match he played against Caruana in 2018, Carlsen chose the Sicilian Sveshnikov as his main weapon. 8. a2a4  8... b5b4  9. a4a5  9... d7d6  10. c2c3  10... a8b8  11. h2h3 A rare move. 11.Bc4 is the most played. 11... h7h6 A solid, typical move, which is hardly a bad one in the Ruy Lopez. It's useful to prevent White from playing the annoying Ng5, attacking the f7-pawn in some lines. 12. d2d4  12... b4c3  13. b2c3  13... e5d4  14. f3d4 [%c_effect d4;square;d4;type;GreatFind;persistent;true] This move is stronger than the pawn capture. 14... c8d7  15. c1f4 Only now a new move is played. This is a very natural try, developing the bishop on a good square. 15... c6e5 [%c_effect e5;square;e5;type;GreatFind;persistent;true] A very accurate move, preventing the natural development of the knight on d2. 16. b1a3 [%c_effect a3;square;a3;type;Inaccuracy;persistent;true] I don't like this move. My coach told me so many times, \"A knight on the rim is dim\" that it caused a certain trauma in my childhood. Now, as an adult, I try to blame a knight in the corner for the defeat in every game I analyze. 16... f8e8  17. f4g3 Caruana decides to advance the kingside pawns, but Carlsen will show a flaw in this plan. 17... e7f8 