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0h h1

0h h1

Our 0h h1 is also known as Takuzu or binary sudoku.

About 42puzzles

We’re a team of puzzle fanatics, offering online puzzles and print services to help publishers increase user engagement and retention.

42 Puzzles
Saturnusstraat 14
2516 AH The Hague
The Netherlands

Contact us

If you have any questions, go ahead and send us an e-mail. We're swift responders and look forward to planning a video call to discuss your questions. Plus, it's always great to see a friendly face behind an e-mail.

Martin Kool
Chief Sudoku Officer
martin@42puzzles.com