From Blue Mungo:
Celtic Warrior uses the triangulation method to create half square triangles (don’t worry, full instructions are included) and requires precise cutting and an accurate ¼” seam allowance, so it’s best suited for intermediate quilters.
The Solid design option creates a very graphic quilt, while the Scrappy design option creates a truly unique visual experience. Please note that the Background, Binding, and Backing fabric requirements are the same regardless of the design option you choose.