1. e2e4  1... e7e5  2. g1f3  2... g8f6  3. d2d4  3... f6e4  4. d4e5  4... d7d5  5. b1d2 A line that had a burst of popularity some 10 years ago, mainly thanks to the efforts of the  prominent Azerbaijani GM Vugar Gashimov. 5... e4d2  6. c1d2  6... f8e7  7. f1d3  7... c8g4 