About LogicPuzzle.io

LogicPuzzle.io is a small, independent puzzle site with one obsession: logic puzzles that play fair. Every puzzle we publish, daily or randomly generated, is verified by a constraint solver before it reaches you. It must have exactly one solution, and that solution must be reachable by step-by-step deduction from the clues alone. If a puzzle can only be finished by guessing, it never leaves the workshop.

The site launched with three games from the same grid-and-constraints family: nonograms (picture puzzles), zebra puzzles (Einstein-style house riddles) and logic grid puzzles (matching grids with checks and crosses). More games are added as the engine grows; the complete index always reflects what is live.

Three house rules shape everything here. First, every daily puzzle is kept forever: the archives only grow, so a puzzle you loved is always one URL away. Second, everything works without an account. Your solve streak lives on your own device, not in our database. Third, the puzzles are free, supported by unobtrusive ads and an optional ad-free subscription.

Solving logic puzzles is one of the few games where the rules never change but you keep getting better at them. We build the site for that feeling, the click of a deduction falling into place. Thanks for playing.