1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1c4  3... g8f6  4. d2d3  4... f8e7 Caruana played this line before in the tournament, against Dominguez, when he saved a lost position. 5. e1g1  5... e8g8  6. b1c3  6... d7d6  7. a2a4  7... c8g4  8. h2h3 