Sample

Progressing

Rules

1. Draw a line to make a single loop. The cells with no lines should be painted black.
2. Lines pass through the centers of cells, horizontally, vertically, or turning. The loop never crosses itself, branches off, or goes through the same cell twice.
3. Black cells cannot touch horizontally or vertically.
4. The numbers show how many black cells there are in the direction of the arrow. The loop does not pass through the cells with numbers, but the cells with numbers should not be painted.

Features

Solution