Kuralin

Sample

Progressing

Solution

Rules

  1. Draw a line to make a single loop and blacken all cells that the line does not pass through.
  2. A black circle must touch more black cells than white cells, a white circle must touch more white cells than black cells, and a gray circle must touch the same number of black and white cells.
  3. The loop passes through the centers of cells, horizontally, vertically, or turning. The loop never crosses itself, branches off, or goes through the same cell twice.

List of puzzles