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 