A typical sacrifice in these lines that has been tried by the great Botvinnik against the great Smyslov.
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... a7a6  4. b5a4  4... g8f6  5. e1g1  5... f6e4 Caruana prepared thoroughly and managed to surprise his opponent with a rare line in the Open Ruy Lopez. 6. d2d4  6... b7b5  7. a4b3  7... d7d5  8. d4e5  8... c8e6  9. c2c3  9... f8c5  10. b1d2  10... e8g8  11. b3c2 