Back Loop Only (BLO)

Work into the back loop to make sharp creases or a knitted look.

BLO crochet symbol
BLO symbol (Wikimedia Commons category: Crochet symbols).

Identify the back loop (farther from you).

Back-loop detail in tapestry crochet (Wikimedia Commons).
Back-loop detail in tapestry crochet (Wikimedia Commons).

Insert hook under the back loop only, complete the stitch.

Execute sc through back loop only.
Execute sc through back loop only.

Next: Invisible Decrease