[%c_effect g4;square;g4;type;GreatFind;persistent;true] A lovely move that will work as a charm. Pawn advances in front of the king are difficult to evaluate: they usually work very well in elite player games and very poorly in amateur games. The plan is to keep advancing the g-pawn, and surprisingly a strong attack is initiated.
1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. b1c3  4... b8d7  5. e2e3  5... f8e7  6. b2b3  6... e8g8  7. c1b2  7... b7b6  8. f1d3  8... c8b7  9. d1c2 So has experience in this position, as he has played it three times previously. The last time was in 2015 in a game that ended in defeat. His opponent chose the more common 9...c5. 9... h7h6 A rare move. Aronian, as usual, has his own creative ideas. The plan is to be able to capture with the knight after a pawn exchange on d5. This will not work well in the game. 10. a1d1  10... c7c5  11. c4d5  11... f6d5 This is the point. 12. c3d5  12... b7d5  13. d4c5  13... e7c5 [%c_effect c5;square;c5;type;Inaccuracy;persistent;true] 14. e1g1 [%c_effect g1;square;g1;type;Inaccuracy;persistent;true] 14... d8e7  15. d3h7  15... g8h8  16. h7e4  16... d5e4  17. c2e4  17... a7a5  18. e4f4 Threatening 19.Qxh6+. 18... h8h7 