1. d2d4  1... g8f6  2. g1f3  2... d7d5  3. c1f4 The London system is a fearsome weapon in the  hands of the Vietnamise GM. 3... e7e6  4. e2e3  4... f8d6  5. b1d2  5... c7c5 And Caruana  cannot complain of practice in the line as well. In this game he decided  to choose something more complex. 6. c2c3  6... e8g8  7. f4g3  7... b7b6 The same idea to swap off his problematic bishop,  borrowed by the French defense. 8. f1d3  8... c8a6 