White sacrifices a pawn but expects good compensation thanks to the bishop pair. The bishop on c4 is particularly dangerous.
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... g8f6  4. d2d3  4... f8c5  5. c2c3  5... d7d5  6. e4d5  6... d8d5  7. b5c4  7... d5d6  8. b1d2  8... c8f5  9. b2b4  9... c5b6  10. f3g5 Now the game takes on a forcing character and simplifications are inevitable. All is still well-known for both players. 10... e8g8  11. d2e4  11... f6e4  12. d3e4  12... d6d1  13. e1d1  13... f5g4  14. d1c2  14... h7h6 