1. c2c4  1... g8f6  2. b1c3  2... c7c5  3. g1f3  3... e7e6  4. e2e3  4... d7d5  5. d2d4  5... a7a6 This is a popular move to keep the central tension and avoid a possible development of White's bishop on b5. 6. c4d5  6... e6d5  7. f1d3 This is only the fourth-most-played move. The bishop normally goes to e2 or even g2 after 7.g3. Capturing on c5 is also a popular choice.