Contact Sudoku365

Get in Touch

Reader feedback has a direct effect on what we work on next. Whether you have a suggestion for a new strategy tutorial, a correction to an existing article, or just want to share a puzzle that gave you a great solve, we'd like to hear from you.

Email

For all inquiries, please email:

[email protected]

We try to respond within a few working days. Replies may be slower on weekends and holidays.

What to Include in Your Message

For Bug Reports

If you've encountered a technical issue, please include:

• A short description of the problem.
• The URL of the page where the issue occurred.
• Your browser and version (for example, Chrome 128, Safari 17).
• Your device type (desktop, mobile, tablet).
• Steps to reproduce the issue, if you can.
• Screenshots if they would help show the problem.

For Puzzle Errors

If you believe a specific puzzle has a problem:

• The date and difficulty of the puzzle (for example, "April 23, 2026 — Hard").
• A description of the issue — multiple valid solutions, no valid solution, or a cell that contradicts the rules.
• Your in-progress grid, if you have it, so we can retrace the deductions.

Every puzzle is programmatically checked for uniqueness before publication, but reports of potential errors are still welcome and we investigate each one.

For Feature Requests

Feature suggestions are welcome. The most useful notes describe:

• The feature you'd like to see.
• How you'd expect to use it.
• Examples from other sites or apps, if they exist.

For General Feedback

What's working well, what isn't, and what could be clearer are all fair game. If a strategy tutorial confused you, that's useful data — the explanation can usually be improved.

Frequently Asked Questions

Before sending a message, it's worth checking whether the question is already answered in the FAQ on the home page or in the strategy guides.

Are the puzzles really free?

Yes. There's no paywall and no subscription. Access to the site is supported by display advertising.

Do I need to create an account?

No account is required. Progress is saved in your browser.

Can I use these puzzles for commercial purposes?

Personal and classroom use is fine. For commercial use (puzzle books, apps, or paid publications), please get in touch through the email above to discuss licensing.

Licensing and Business Inquiries

For licensing, partnerships, or other business matters, use the same email and include "Licensing" or "Business" in the subject line so it doesn't get mixed with general feedback.

Reporting Security Issues

If you've discovered a security vulnerability, please report it responsibly by emailing [email protected] with "Security Issue" in the subject line. Please do not publicly disclose security issues until we've had a chance to address them.

Thank you for reading and for any feedback you send along. Return to the homepage or start solving a daily puzzle.