Free Quilt Block Pattern
The Slip Knot quilt block is a bit of an optical illusion, in that it appears that fabrics weave across each other. This is technically an eight patch block as it is designed on an 8 x 8 grid, but I like to sew this block as an uneven nine patch because I find it easier to work in "chunks" instead of rows. However, please feel free to construct as you like.
This block contains simple patches -- squares, rectangles, half square triangles and flying geese. The challenge is that there are many pieces, and many seams. So, if you pay close attention to sewing a precise quarter inch seam allowance, you will find this block goes together easily.