Those of you who followed my mini-course on Chess.com about the KIA are familiar with the ideas for both sides. White is quickly  building a strong attacking setup on the kingside while maneuvering his  queenside knight to g4, whereas Black tries to counter on the opposite  wing and the center.
1. g1f3  1... d7d5  2. g2g3  2... g8f6  3. f1g2  3... e7e6  4. e1g1  4... f8e7  5. d2d3 Nepomniachtchi chose the  King's Indian Attack for the decisive game. 5... e8g8  6. b1d2  6... c7c5  7. e2e4  7... b8c6 This can be considered Black's main line. 8. f1e1  8... b7b5  9. e4e5  9... f6d7  10. d2f1  10... a7a5 