[%c_effect a5;square;a5;type;Inaccuracy;persistent;true] This looks like a strange move, but White wants the queen in a worse position. The problem is that he loses the option of capturing on b5 and opening the queenside.
1. e2e4  1... c7c5  2. g1f3  2... d7d6  3. f1b5  3... b8d7  4. e1g1  4... a7a6  5. b5e2 [%c_effect e2;square;e2;type;Interesting;persistent;true] A currently fashionable move. 5... g8f6  6. d2d3 Black has to make a common decision for Sicilian players: where to develop the f8-bishop. 6... g7g6 The most popular choice but Carlsen played 6...e6. 7. a2a4  7... b7b6 A good move, preparing development and preventing a4-a5. 8. f3d2 [%c_effect d2;square;d2;type;Interesting;persistent;true] The same plan Nepomniachtchi tried against Carlsen. 8... f8g7  9. f2f4  9... c8b7  10. d1e1  10... b6b5 A good move, but castling is also perfectly possible. 11. b1c3  11... d8b6 