This position is tricky, but, of  course, Mamedyarov's solution is the most direct.
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... a7a6  4. b5a4  4... g8f6  5. e1g1  5... f6e4 Of course,  Mamedyarov can play anything, but the Open Spanish is not among his  regular choices. Usually, it's the Steinitz with g7-g5! 6. d2d4  6... b7b5  7. a4b3  7... d7d5  8. d4e5  8... c8e6  9. c2c3  9... f8c5  10. b1d2  10... e8g8  11. b3c2  11... e4f2  12. f1f2  12... f7f6  13. d2f1  13... c5f2  14. g1f2  14... f6e5  15. f2g1  15... e6g4  16. c1g5 Is that a novelty? 16... g4f3  17. d1d2  17... d8d6  18. g2f3 