1. d2d4  1... d7d5  2. g1f3  2... g8f6  3. c1f4  3... c7c5  4. e2e3  4... e7e6  5. b1d2  5... d8b6  6. c2c4 [%c_effect c4;square;c4;type;Interesting;persistent;true] Mamedyarov, of course, plays the London System in an enterprising way. This dynamic move is rare, but has been played a few times by Erigaisi recently. 6... b8c6 [%c_effect c6;square;c6;type;GreatFind;persistent;true] The best reply. Accepting the pawn is too risky. 7. f1d3 Played after a long think. This is an important position for opening theory. 7... c5d4  8. e3d4 The real novelty. 8... c6d4  9. e1g1  9... f8e7  10. c4d5  10... d4f3  11. d1f3  11... e6d5 A solid move, taking the squares from White's knight and opening the diagonal for the bishop. 12. f1e1  12... c8e6 