Now, in comparison  with the line from above, it is Dubov's move.
1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. g2g3  4... f8b4  5. b1d2  5... e8g8  6. f1g2  6... b7b6  7. e1g1  7... c8b7  8. f3e5  8... a7a5  9. d1c2  9... a5a4  10. f1d1 This natural move is a novelty. The rook is  entering the battle while at the same time it overprotects the center. 10... b4d6 A useful retreat. 11. c4d5  11... e6d5  12. d2c4 Still good!