1. d2d4  1... g8f6  2. c1g5 The Trompowsky. A few years back it was in the spotlight, with all the top GMs rushing to invent something new in it. Then came the London... 2... f6e4  3. g5f4  3... c7c5  4. f2f3  4... d8a5  5. c2c3  5... e4f6  6. d4d5  6... a5b6  7. f4c1 Yes, this is the main line. And no, White is not setting up the pieces for a new game. 7... e7e6  8. e2e4  8... e6d5  9. e4d5  9... f8d6  10. b1a3 Modern strategy in action. On move 10 White is finally developing his knight...on the rim. But, there is a serious reason for White to be capable of playing this way: his super center. Still, Tarrasch might have had hard time analyzing the modern games. 10... e8g8  11. g1e2  11... f8e8 Black's play, on the other hand, is pretty straightforward. [#] 12. g2g4 An active way to develop the kingside. 12... d6f8  13. a3c4 This is needed, or else White risks to see the game opened. 13... b6a6  14. c4e3  14... b7b5  15. e2g3 Move 15, and White has only played with the pawns and the knights. This should have been a warning sign for Erigaisi. 15... c8b7  16. e1f2  16... e8e3 [%c_effect e3;square;e3;type;GreatFind;persistent;true] A strong move $1 For a small chunk of material, Pranav gains control of the center and a clear shot to the enemy king. 17. c1e3  17... f6d5  18. e3c1  18... c5c4 Whereas now it is the white king that suffers permanently. 19. g3e4  19... a6b6  20. f2g2  20... b8a6 Black is calmly finishing the development. The opponent's king has nowhere to hide. 21. a2a4  21... a6c5 Consistently clearing the road for the bishops. 22. e4c5  22... f8c5  23. a4b5 