Centered double decrease can be abbreviated in different ways, but most common are: CDD and S2KP (slip 2, knit, pass (2) stitches over).
Working with Centered double decrease (CDD):
- Step 1: Slip 2 stitches at the same time.
- Step 2: Knit 1.
- Step 3: Pass both slipped stitches at once over the knit stitch.