[%c_effect g4;square;g4;type;Mistake;persistent;true] Now White is completely lost.
1. c2c4  1... g7g6  2. e2e4  2... e7e5  3. g1f3  3... f8g7  4. d2d4  4... e5d4  5. f3d4  5... g8f6  6. b1c3  6... e8g8 An interesting variation that I didn't know about. Black has an improved version of similar King's Indian lines, as the pawn can move to d5 in one go. This will be the main theme of the opening: how White should react to the break on d5. 7. c1e3  7... c7c6 [%c_effect c6;square;c6;type;GreatFind;persistent;true] The most accurate move. 8. d1d2 This is a new move. 8... f8e8  9. f2f3  9... d7d5  10. e4d5  10... c6d5  11. e1c1  11... b8c6  12. d4c6 [%c_effect c6;square;c6;type;Mistake;persistent;true] Black achieves a strong initiative after this move. White has many better alternatives. The analysis of all of them is impossible, so I'll limit myself to listing the moves and their ideas. 12... b7c6  13. e3d4 Fighing for the important a1-h8 diagonal. 13... a8b8  14. c4d5 [%c_effect d5;square;d5;type;Mistake;persistent;true] Sevian probably missed Black's next move. 14... c6c5 [%c_effect c5;square;c5;type;Brilliant;persistent;true] This brilliant move is devastating. White is forced to either exchange the bishop and suffer on the dark squares, or capture the pawn and suffer with a lack of development. 15. d4c5  15... d8a5  16. c5d6  16... c8f5 [%c_effect f5;square;f5;type;Mistake;persistent;true] Chess is a difficult game. Sindarov plays the initiative move par excellence, sacrificing the exchange. Here, however, it's better to move the rook and continue the attack calmly.