1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1c4  3... f8c5  4. d2d3  4... d7d6  5. c2c3  5... c5b6 \"Fabiano [Caruana] made this move popular. He played it in Paris two years ago.\" (So). Black keeps his kingside knight undeveloped for the time being in order to avoid the pin with Bc1-g5. 6. e1g1  6... h7h6  7. b1d2 There is no need to invent anything extraordinary. The normal development is a good way to face Black's idea. 7... g8f6 