1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... g8e7 This is the Cozio Variation of the Ruy Lopez, and it has appeared in other \"Games of the Day.\" Nakamura has used it a few times with Black but not often. He played a game with White against Caruana in 2024 that may have sparked his idea to play it with the other color. 4. b1c3 White has three other major moves. 4... e7g6  5. d2d4  5... e5d4  6. f3d4  6... c6d4  7. d1d4  7... c7c6  8. b5e2  8... d8b6  9. d4d3 All of White's moves are very natural, and this is a critical line for Black's system. 9... f8e7  10. a2a4  10... a7a5  11. e1g1  11... e8g8  12. c1e3 Now White can play this move without having to sacrifice a pawn, since with the inclusion of a4-a5, the queen is left without a square. 12... e7c5  13. e3c5  13... b6c5 