Chocona (チョコナ) is a puzzle type that likely originates with Nikoli. I have adapted it to play on a Truncated Square grid.
Rules
Shade some cells such that:
- A filled square may not share an edge with a filled octagon.
- Filled octagons may share an edge, but only if the contiguous area of filled octagons forms a 45° oriented rectangle.
- Each bold-outlined region must have at least one filled octagon.
- Numbers indicate exactly how many cells, octagon or square, are filled in a bold-outlined region. Regions with no number can have any number of filled cells.
Example
Puzzles
All of the puzzles can be found organized in this printable PDF, or in the images below.
01. Easy
02. Medium
03. Medium
04. Hard
05. Hard
06. Hard
07. Expert
Paramesis Puzzle Blog 