The right-hand column of the swatch shows Lace Crescent Rib version 1; the other two columns show version 2.
Version 2 of Lace Crescent Rib uses a different method for dealing with the double YOs.
Shown with a cast-on count of 16 stitches.
1 2 3 4 5 Horizontal repeats
1 2 3 4 5 Vertical repeats
Swatch photo uploaded by Gannet