comment: This is one of the sharpest variations of the French advance, leading to positions with many tactical complications.
context: 1. e2e4  1... e7e6  2. d2d4  2... d7d5  3. e4e5  3... c7c5  4. c2c3  4... b8c6  5. g1f3  5... c8d7  6. f1e2 