1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. b1c3  4... c7c5 The Semi-Tarrasch is becoming more common nowadays, particularly now that people have found that the 5...cxd4 line is pretty good at forcing a draw. 5. e2e3 This move is well known to be what White plays when he is trying to avoid theory and just get a game, but Hikaru was clearly well prepared. 5... b8c6  6. a2a3  6... d5c4  7. f1c4  7... a7a6  8. c4d3 This is uncommon. 8... b7b5  9. d4c5 The computer seems to think White has a little pull here. I don't really buy it. Normally, for White to be better in this symmetrical structure, he should have better coordination (i.e. a knight on d2 vs. a knight on c6, for example). Even then, it tends to be pretty thin. With all the pieces on the same squares as well as all the pawns, it is hard to believe Black is not totally fine. 9... f8c5  10. b2b4  10... c5e7  11. e1g1  11... c8b7  12. c1b2  12... e8g8  13. c3e4 According to the machine, this move is best. But this is a very bad sign for White- it leads to mass exchanges in a symmetrical position.