About Legen Sudoku
A free Sudoku site with clear verification.
Legen Sudoku is a free, independently maintained website where you can play, learn techniques, and see how puzzles are checked.
Who is responsible
The site owner is responsible for the puzzles, corrections, and information published here. We do not claim human expert review, medical benefits, ratings, or user-study results.
What engine verification means
The engine checks puzzle format and uniqueness, then accepts only logic steps that pass a separate verification check. The engine is a tool, not an author or human reviewer.
Privacy by default
The site has no accounts or advertising profiles. Cloudflare Web Analytics measures page views and performance without cookies or local storage. Sudoku entries are not sent to it, and Solver inputs stay in your browser.
Corrections
Report the Puzzle ID, page URL, language, and the fact that appears wrong. If the issue is confirmed, we publish a dated correction and check the affected puzzle again.
Contact and correction channel
Use the feedback page or email the address shown there. Please do not send passwords, private keys, payment details, or other sensitive information.