1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... c7c5  4. d4d5  4... b7b5 The Blumenfeld gambit is not the  most common opening at a top level, but something creative should  definitely be expected by these two players! 5. d5e6  5... f7e6  6. c4b5  6... d7d5  7. g2g3  7... a7a6 A fresh approach. 8. b5a6  8... b8c6  9. f1g2  9... f8e7  10. e1g1  10... e8g8  11. b1c3  11... c8a6 The opening is more or less over, and Mamedyarov got the usual compensation for the line. Unlike the Benko  gambit where Black mainly operates on the half-open a- and b-files, Black  searches for a quick kingside attack in the Blumenfeld. He often succeeds  in doing so, thanks to his solid center. 12. b2b3  12... h7h6  13. c1b2 The obvious development is a novelty. 13... d8e8 Natural and good. That is the main idea of the line. The  queen is transferred to the h5-square, next Nf6-g4 will follow and the  half-open f-file would provide Black decisive attacking supplies.