Logic Puzzles
Free daily logic puzzles, no sign-up. Play nonograms, zebra puzzles and logic grid puzzles online, plus unlimited random puzzles and printable sheets.
Play Free Online Logic Puzzles
LogicPuzzle.io is a home for people who like their games solvable by pure reasoning. Every logic puzzle here is machine-verified before publication: it must have exactly one solution, and that solution must be reachable by step-by-step deduction, never guesswork. You can play every logic puzzle online for free, right in the browser, on any device.
All Logic Puzzle Games
Nonograms
Play free nonogram puzzles online — a new daily picross-style picture logic puzzle every day, plus unlimited mode, archives and printable sheets. No sign-up.
Zebra Puzzles
Line up houses, residents and pets from positional riddles.
Play free →
Logic Grid Puzzles
Match people to pets, drinks and hobbies by pure elimination.
Play free →
Looking for something specific? Browse the complete puzzle index.
Daily Logic Puzzle
Daily Nonogram #1 Tuesday, September 29, 2026 easy
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Prefer a different flavor today? Play the daily zebra puzzle or the daily logic grid puzzle.
What Are Logic Puzzles?
A logic puzzle is a puzzle that can be solved entirely by inference: the clues contain enough information to force a unique answer, and finding it is a process of elimination, cross-referencing and constraint tracking rather than trivia knowledge or luck. The family tree is old. Logic grid puzzles descend from the deduction tables of mid-century puzzle magazines, zebra puzzles from the "who owns the zebra" riddle popularized in 1962, and nonograms from Japanese picture-painting grids of the late 1980s.
What the best logic puzzles share is a fair contract: nothing hidden, no ambiguity, no guessing. That contract is the founding rule of this site. Our puzzle generator runs a constraint solver over every grid before it is published and rejects anything that cannot be finished by clean deduction, so when you are stuck, the answer is always another inference, never a coin flip. Solve them regularly and the habit carries over: you start noticing which constraints carry the most information, in puzzles and out of them.
Logic Puzzles by Difficulty
Every game here scales from a two-minute warm-up to a sit-down challenge. The daily puzzles rotate: Mondays and Tuesdays are deliberately gentle, midweek puzzles grow, and the weekend editions are the big ones. Unlimited mode lets you pick a size explicitly.
Easy
5×5 nonograms, 3-house zebra puzzles and 3-category logic grids. Learn the method in minutes.
Medium
10×10 nonograms, 4-house zebra puzzles and 4-category logic grids. The daily sweet spot.
Medium nonograms Medium zebra puzzles Medium logic grid puzzles
Hard
15×15 nonogram pictures, five-house Einstein riddles and 5-category logic grids for the weekend.
Printable Logic Puzzles
Every daily puzzle since launch is available as a clean, print-ready sheet: the grid or clue list, an empty solving area, and the full solution printed at the bottom of the page. Printable logic puzzles are perfect for classrooms, puzzle clubs, waiting rooms and screen-free evenings. Print it, solve it in pencil, check yourself, recycle it.
FAQ
What are logic puzzles?
Logic puzzles are games of pure deduction: you are given a grid, a set of clues or number constraints, and exactly one arrangement that satisfies all of them. Classic examples include nonograms (picture grids), zebra puzzles (Einstein-style house riddles) and logic grid puzzles, and all three are playable here, free.
Are these logic puzzles free to play?
Yes. Every puzzle on LogicPuzzle.io is completely free: the daily puzzle, the full archive, unlimited mode and the printable versions. The site is supported by ads, and an optional subscription removes them.
Do I need an account to play logic puzzles online?
No sign-up, no download, no app. Open a puzzle page and play directly in your browser on desktop, tablet or phone. Your solve streak is stored privately on your own device.
What types of logic puzzles can I play here?
Currently three families, all powered by the same grid-and-constraints engine: nonograms (also known as picross or griddlers), zebra puzzles, and logic grid puzzles. More logic puzzle types are added regularly, see All Puzzles for the current list.
Is there a new puzzle every day?
Yes. Every game gets a fresh daily puzzle at midnight UTC, the same one for everyone, with a countdown to the next. Daily difficulty rotates through the week from easy warm-ups to weekend challenges, and every past puzzle is kept forever in the archive.
Can I play logic puzzles on my phone?
Absolutely. The boards are touch-friendly: tap to fill cells in nonograms, tap once for a check and twice for a cross in logic grids. Everything works in any modern mobile browser.