1. e2e4  1... e7e5  2. g1f3  2... g8f6  3. b1c3 Needing the win to equalize the match, Hansen decides to run away from a theoretical battle in the main lines of the Petrov Defense. 3... b8c6  4. f1b5  4... c6d4 This is probably the most reliable move for Black. I've seen Dominguez play since the beginning of his international career in the early 2000s and at that time he already had a reputation for having a well-studied opening repertoire.