Deduction puzzles

Logic Grid Puzzle Generator

Create a fresh "who owns the zebra" puzzle in one click. Every puzzle is checked by a solver to have exactly one solution, and you can solve it right here or print it.

Puzzle

    Click a grid cell to cycle between empty, ✕ (ruled out) and ● (match). Click a clue to strike it through once you have used it.

    Runs entirely in your browser. Nothing is uploaded to any server.

    Why use this logic puzzle generator

    Always solvable

    A built-in solver confirms that the clues lead to exactly one answer, so there is no guessing.

    Endless fresh puzzles

    Every puzzle number creates a new arrangement, and you can share a number to give friends the same puzzle.

    Classroom ready

    Print a clean sheet with clues and grids for brain-teaser time, clubs or homework.

    How to make and solve a logic grid puzzle

    1. Choose the settingsPick a theme, how many items and categories, and a difficulty level.
    2. Generate and read the cluesEach clue tells you what matches or what does not. Use them one by one.
    3. Fill in the gridMark impossible pairs with a cross and confirmed pairs with a dot, then check your work.

    How the puzzles are built

    The generator first creates a random hidden answer, matching every person with one item from each category. It then draws clues from true facts about that answer: direct matches, ruled-out pairs and comparisons such as "younger than" or "exactly two houses lower".

    After each clue is added, a backtracking solver counts how many answers fit. Clues are added until only one answer remains. On medium and hard, the generator then tries removing each clue and drops any that are not needed, leaving a tighter puzzle that relies on deduction.

    Direct clues

    State that two things belong together. Easy puzzles use more of them.

    Negative clues

    Rule out a pairing. They make you cross off cells and think in eliminations.

    Ordering clues

    Compare positions, ages, times or prices, which adds a layer of reasoning.

    Logic grid puzzle FAQ

    How do I solve a logic grid puzzle?

    Read each clue and mark the grid: a cross for pairs that cannot match and a dot for pairs that do. When a row has one empty cell left, that cell must be a match. Carry matches across grids to unlock more deductions.

    Is every puzzle really solvable?

    Yes. The solver checks every possible answer and only keeps a clue set that allows exactly one.

    What does the puzzle number do?

    It is a seed for the random generator. Enter the same number with the same settings to recreate an identical puzzle.

    Which size should I start with?

    Three items and three categories is a gentle introduction. Five items with four categories on hard can take a while even for experienced solvers.

    Can I print the puzzles?

    Yes. Use the Print button. The site menu, buttons and help text are hidden so only the clues and grids are printed.

    Try other puzzle tools

    More free tools from My Panda Toolbox.

    SUDOSudoku GeneratorMake printable sudoku grids. PIXNonogram Picross PuzzleSolve picture logic grids. WSGWord Search GeneratorCreate word search sheets. XWDCrossword Grid GeneratorBuild crossword grids.