Caruana is the first one  to spend time on the clock.
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... a7a6  4. b5a4  4... g8f6  5. e1g1  5... f8c5  6. c2c3  6... b7b5  7. a4c2  7... d7d5 A  very sharp line. 8. d2d4  8... d5e4  9. d4e5 Nakamura gets rid of the queens at  once. 9... d8d1  10. f1d1  10... e4f3  11. e5f6  11... g7f6  12. c2e4  12... c8d7  13. b1d2 Only a  handful of games were played in this line, but both players are making  their moves confidently and fast.