Puzzle types
The rules of every puzzle on the site, each with pictures of what works and what doesn’t, and a worked example.
Regions
- PanesCut the window into panes of stained glass that follow every rule listed with the puzzle.
- Shikakualso Rectangles, Divide by BoxCut the grid into rectangles, each holding one number: its size.
- Spiral Galaxiesalso Tentai ShowSplit the grid into regions that look the same turned halfway round their circle.
- Square JamSplit the grid into squares; four never meet at a point, and a number is its square's side.