You can contact Sudoku Duck by email at contact@sudoku-duck.com.
Please include a clear subject line and a short description of the page or issue you are writing about. If you found a puzzle problem, include the page, difficulty, and any details that would help reproduce it.
There is no backend contact form on this site. A direct email link keeps the page simple and avoids collecting extra form data.
For privacy questions, cookie questions, or advertising questions, you can also use the same email address. Please do not send sensitive personal information unless it is needed for your request.