Magnus Plays a Place That Will Queen Take the D Four

Magnus played a place that will Queen take the D four, which is very rare. He was trying to protect his prep and what he wanted against Catalan. I'm not saying it's what happened, but that's the only possible explanation. The Bishop takes F six, you go Rook A to B eight and the Queen is trapped. That could be an explanation. But for this thing, Magnus playing G free name. It makes perfect sense.