Who is faster? This is the main question in this line. White has the advantage of the extra move, but Black can  advance his queenside pawns with tempos.
1. e2e4  1... e7e5  2. g1f3  2... d7d6 Almost a novelty for the world champion. This is only  the second time he has used the Philidor defense. 3. d2d4  3... e5d4  4. f3d4  4... g8f6  5. b1c3  5... f8e7  6. c1f4 Dominguez chooses the most principled line. 6... e8g8  7. d1d2  7... c7c6 