This move scores better than 7.c3 at the moment. White intends to open the center as soon as possible.
1. e2e4  1... c7c5  2. g1f3  2... d7d6  3. f1b5 The Moscow line is very popular nowadays. 3... b8d7 This move leads to a complex battle. 4. e1g1  4... a7a6  5. b5d3 The main variation. 5... g8f6  6. f1e1  6... e7e6 