Hi @thuban, the sweater is worked bottom up. The ribbing is crocheted first, then a foundation row of single crochet worked down the long side of the rib, then onto the main filet pattern. This way everything is crocheted together from the start and its on!y weaving in ends later :) front and back and worked separatly and seamed with single crochet down the sides and along shoulders. Neckline is then crocheted onto the space. Yarn is joined for sleeves and filet pattern continued.
I was surprised by how good the ribbing came out! Such a simple method and looks like it took a lot more time! To start i chain 13, then single crochet in each chain (12 sc). Every row from then is sc in backloops - so straightforward :) give it a shot!
Very cleverly done, indeed. It really does look more complicated. I might have to put this in my queue to give it a try; at the very least I need to add that ribbing to my repertoire. Thanks!