Blueberry Puzzle

Blueberry Puzzle is a minimalist logic game that challenges you to think carefully and plan ahead.

Place berries on a 9×9 grid so that:
- each row contains exactly three berries
- each column contains exactly three berries
- each 3×3 block contains exactly three berries

Some cells contain numbers.
These numbers indicate how many berries are placed in the surrounding cells — including diagonals — similar to classic minesweeper-style clues.

The challenge is to combine the number clues with the exact-count rules to deduce the correct placement.

### Features
- Clean, distraction-free design
- Multiple puzzle difficulties
- Visual highlighting of rule violations
- Undo / redo support
- Fully offline play
- No ads, no tracking, no data collection

### Inspiration
This app is an independent implementation inspired by the Blueberry Trio logic puzzle originally published at:
https://circle9puzzle.com/bbtrio/

### Open Source
The project is open source and available on GitHub:
https://github.com/AndreyCorelli/blueberry-puzzle-app