Clue Satisfied

Easy Used by Smart Hint

Once a clue's line count is already met, every other side of that cell is ruled out; once a clue needs every remaining side, all of them are forced in.

Edge on the loop
Edge ruled out
Cells that establish the pattern

How it works

This cell's clue is 1, and its top edge is already a line — the clue is already satisfied.
Every other edge of this cell must be ruled out: mark the bottom, left, and right with an X.