Open Sudoku

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Changes in v4.3:
* New "Hint" strategies implemented
* Fixes (invalid puzzles, landscape mode, puzzle editor)
* Translations updates

Open Sudoku 4 brings with it a complete code rewrite, new features and multiple improvements:
* Import/export Sudoku from various sources
* Edit/create your own Sudoku puzzles with verification of it's validity
* Use "Hint" to see next step hints when you get stuck
* Double pencil marks (optional)
And much more. Go to the project page to see full change log.