1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... f8b4  4. e2e3  4... b7b6 Less played than 4...0-0 or 4...c5, but still with a gigantic theory, like all the lines of this classic Nimzo-Indian line. 5. g1e2 A logical move, which has the idea of ​​playing a3 and then taking with the knight on c3. 5... f6e4  6. c1d2 Preserving White's good pawn structure. The same can be achieved with 6.Qc2, a popular alternative that has been played by Arjun himself. 6... e4d2 Better to take a bishop than a knight, at least in this position. 7. d1d2  7... e8g8  8. a2a3  8... b4e7  9. g2g3 Developing the bishop on g2 is a natural idea, although White has to be careful after Bb7. 9... c8b7  10. e3e4  10... b8c6 Black prepares to challenge the white center, either by playing …e6-e5 or with Na5 attacking the c4-pawn. 11. d2d3 A new and good move. 11... b7a6 The start of a completely crazy plan. 12. b2b4  12... e7b4 The only justification for the previous move, but even so it is better to just return the bishop to b7. 13. a3b4  13... c6b4  14. d3b1  14... c7c5 Arjun made a mistake in his judgment when he entered this position, as his compensation isn't enough. He is an elite player who, unlike his peers, plays a lot of open tournaments and is used to taking risks to win games with Black. This time, however, I think he overdid it. 15. a1a6 There was no need to return material. 15... b4a6  16. d4d5  16... a6b4 Now we have a material imbalance of bishop and knight against rook and two pawns, with a complex position with chances for both sides. White still has some advantage, but the position has become difficult to play. 17. f1g2  17... e6d5  18. c3d5 This move is debatable. 18... b4d5  19. e4d5 