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  8. c4b3  8... a7a5 [%c_effect a5;square;a5;type;Interesting;persistent;true] A rare move. Black wants to preserve his dark-squared bishop. Why this pawn stands better here than on a6 is somewhat of a mystery. 9. f1e1  9... e8g8  10. h2h3 \"I thought I was slightly worse out of the opening, but nothing special.\" (So) 10... c8e6 \"I like this move.\" (So) 11. b3e6  11... f7e6  12. d2c4  12... b6a7  13. c1e3 The bishop is too annoying to be tolerated. 13... a7e3 