I just bought the book "Hip Knits" from Better Homes and Gardens and I'm very confused by the ribbing instructions for a hooded sweatshirt pattern. (Should you own the book, the pattern is on page 60.)
The instructions for the ribbing are as follows: Row1: knit Row2: P1; (k1B, k1B, p1)
Repeat rows 1-2 for rib pattern
There are special instructions for "k1B", which is where I'm totally baffled:
k1B: Knit into next st, one row below, at same time, slip of st above.
To me, it sounds like an increase, but that just doesn't make sense, especially when looking at the finished piece in the picture. The other thing I found odd is that it's worked over an odd number of stitches. Also, in the gauge for the ribbing it says "9-1/2 sts and 15 rows = 4 inches" The "9-1/2 sts" greatly confuses me; most other patterns I have followed have used whole stitches.
It's not an increase, it creates a rib like pattern also called Shaker stitch or Fisherman's rib. To do k1B you would insert your needle into the stitch below the one on your left needle, wrap the yarn around and pull out the new stitch, dropping both stitches off the left needle (the one on the needle and the one below it.) I think there's a video for it in the Glossary under K1B