1. e2e4  1... e7e5  2. g1f3  2... g8f6  3. d2d4  3... f6e4  4. f1d3  4... d7d5  5. f3e5  5... b8d7 A solid line, which has been used by the likes of Kramnik and Gelfand, to name a few. 6. e1g1  6... d7e5  7. d4e5 