Contact
Email hello@ilovesudoku.app. That is the right address for a broken puzzle, a correction to a strategy page, a classroom set, or a partnership.
If a board seems to have two solutions or to require a guess, use Report this puzzle on the game and include the puzzle number, which looks like k9-000123. Reports stay on your device until you also email them; the number is what we need in the message.
We read mail in English. We do not offer phone support.