comment: [%c_effect c2;square;c2;type;Interesting;persistent;true] This is Nepomniachtchi's new idea, good enough for a rapid game. As often happens, no more than five minutes after the new move is played, opening experts from all over the world will come up with an antidote, but by then the novelty may have already borne fruit.
context: 1. d2d4  1... d7d5  2. c2c4  2... e7e6  3. b1c3  3... c7c5  4. c4d5  4... e6d5  5. g1f3  5... b8c6  6. g2g3  6... g8f6  7. f1g2  7... c5d4  8. f3d4  8... f8c5 Firouzja played this line in an important tournament this year. It's clear that Nepomniachtchi was expecting it, and he came armed with some fine preparation. 9. d4b3  9... c5b6  10. c3d5  10... c8e6  11. d5b6  11... d8d1  12. e1d1  12... a7b6 [%c_highlight d1;keyPressed;none;opacity;0.8;square;d1;persistent;false] Supposedly Black has excellent compensation since White's king is not safe.