Mamedyarov tries to fight the annoying knight at once and does it with a novelty.
1. g1f3  1... g8f6  2. g2g3  2... d7d5  3. f1g2  3... e7e6  4. e1g1  4... f8e7  5. c2c4 After a short flirt with the open games against Carlsen, Artemiev returns to his bread and butter—the Reti. 5... d5d4  6. e2e3  6... c7c5  7. e3d4  7... c5d4  8. f3e5 It is a reversed Benoni and besides the first move advantage White has one more hidden tempo—the black e-pawn only moved to the sixth rank. Thus, why not play more actively?