Inserters can only place on a blank spot on in a storage space. I suggest you box in the spot so the new can’t move therefore no new pieces can be placed.

If that doesn’t wory try using an underground belt to split it in half.

Build a bigger factory and agro the shrimps near his factory.

holy hell, new platform just dropped

look up en passant

You need legendary level quality parts to combat this.

You are white, you get the white modules

Enemy base looks inefficient and should be easily bottlenecked. Would recommend building a more efficient factory to counter his. Also, automate more pieces than just pawns - they might use a lot of red circuits, but you’ll need the reds later anyways so you might as well automate that