context: 1. e2e4  1... c7c5  2. g1f3  2... e7e6  3. c2c4 An interesting sideline (if a move with more than ten thousand games can be called that) that is played by very strong GMs from time to time. 3... b8c6  4. d2d4  4... c5d4  5. f3d4  5... g8f6  6. b1c3  6... f8c5 An important moment. 6...Bb4 is by far the most popular move. 7. d4b3 It's hard to say which move is better.