A seemingly harmless move played by Carlsen in a couple of games in 2022. White reinforces the center to have the option of capturing with the pawn after cxd4.
1. g1f3  1... d7d5  2. g2g3  2... c7c5  3. f1g2  3... b8c6  4. d2d4  4... g8f6  5. e1g1  5... e7e6 