[FEN "r1bqk1nr/p1ppbppp/1p6/n2P4/8/2N5/PPP1QPPP/R1B1KBNR w KQkq - 3 7"] 1. g4
With White to move, the Lichess engine suggests g4 in this position. Can someone explain why it's a good move?
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Black would like to continue their development with Nf6 and castling short. g4 discourages Nf6; after g5, the knight is forced back. It also prepares Bg2, which protects d5 without giving up the pin on the e-file. The weakening of the kingside apparently isn't too much of a problem; Black isn't developed enough to take advantage of this, and White can always castle queenside.