Loop logic puzzle

Fences: free loop logic puzzle online

Draw one loop around numbered squares. Each number tells you how many of that square's four edges are in the loop.

No account needed. For today's shared board, open the Daily Challenge.

Start here

Scan for 0s and 3s first. A 0 rules out all four edges. If one edge around a 3 is ruled out, the other three must be lines. At each corner, the loop uses either zero or two edges, so a line cannot end or split there.

RulesLearn how numbers count edges and how all lines form one loop. StrategyUse number clues and corner rules without closing the loop too soon.

How a turn works

Click or tap an edge to cycle empty, line, and marker. Markers are notes for edges you think should stay empty. Hold Shift and click to change only the marker.

Difficulty

We aim for each board to fit one sitting. Easy is shorter. Hard takes longer. If you want more, start another puzzle.

EasySmaller grids with more early moves.

StandardMore blank squares make line-end checks matter.

HardMore open edges to compare before the loop takes shape.