If you sew it as pictured yes it will have Y seams. But if you make the blue / light orange round out of hst and squares, (the blue triangle and the lt orange right next to it as hst, then the middle lt orange rectangle as a square, hope that make sense) you could do it w/o Y seams. However they are selling the "Go" so if it cuts the blue triangle as shown it will have Y seams.