The early sortie of this bishop  is a double-edged sword. It might do a great job pinning the opponent's  knight, but it may end up excluded from the game. At the same time, in  order to force the bishop out of the game Black needs to advance the pawns in front of his king, thus exposing it.
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1c4  3... f8c5  4. c2c3  4... g8f6  5. d2d3  5... d7d6  6. c1g5  6... h7h6  7. g5h4  7... a7a6  8. b1d2  8... c5a7  9. e1g1  9... e8g8  10. a2a4  10... g7g5 