A novelty. Black keeps all the pieces and pawns on board, making it as complex as it can be.
1. d2d4  1... g8f6  2. c2c4  2... g7g6  3. b1c3  3... f8g7  4. e2e4  4... d7d6 \"He is a very solid player, so the King's Indian was a normal choice I think.\" (Firouzja) 5. f1e2  5... e8g8  6. h2h4 \"Very fresh [approach].\" (Firouzja) 6... b8c6  7. d4d5  7... c6e5  8. h4h5  8... c7c6  9. h5h6  9... g7h8  10. g1f3 