1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g2g3  3... d7d5  4. f1g2  4... d5c4  5. g1f3  5... c7c5  6. e1g1  6... b8c6  7. d1a4  7... c8d7  8. a4c4  8... b7b5  9. c4d3  9... c5c4  10. d3d1  10... a8c8  11. c1f4 Arjun is full of original ideas, but today it is his opponent to demonstrate one. This move is currently scoring better than 11.Re1. 11... f8e7 The main line. 12. b1c3  12... a7a6  13. a2a3  13... c6a5  14. d1c2  14... f6d5 [%c_effect d5;square;d5;type;Interesting;persistent;true] Santos is the first one to deviate from the trodden path. 15. c3d5  15... e6d5 Black has stabilized the center. If he manages to castle, his queenside majority will become a long-term asset. But since White has a temporary development advantage... 16. e2e4 [%c_effect e4;square;e4;type;GreatFind;persistent;true] is needed. Santos stabilizes the center further with 16... d7e6  17. f1e1  17... a5c6 and misses his chance to castle $1 18. e4d5 [%c_effect d5;square;d5;type;GreatFind;persistent;true] Now White opens up the game in his favor. 18... e6d5  19. c2f5 [%c_effect f5;square;f5;type;GreatFind;persistent;true] Arjun prevents his opponent from castling. 19... g7g6 Not the most desirable move, but what else $2 20. e1e7 [%c_effect e7;square;e7;type;Brilliant;persistent;true] Arjun has a strong sense for the initiative and seizes the chance $1 20... c6e7  21. f5f6  21... h8f8  22. f6a6 For a minuscule prize, White has kept the enemy king in the middle and is ready to shift his reserves toward it. 22... f7f6 [%c_effect f6;square;f6;type;GreatFind;persistent;true] The only chance. Black needs to castle by hand ASAP. 23. a1e1  23... f8f7  24. a6b5 As often happens, the most obvious move is not the best. Arjun throws away all his positional advantage for just one pawn. 24... e8f8 [%c_effect f8;square;f8;type;GreatFind;persistent;true] Now Santos' position is even easier to play. More importantly, the psychological switch from an attack to defense is extremely difficult, even for a talent like Arjun. 25. h2h4  25... f8g8 