All Logic Puzzles – Free Puzzles to Play Online and Print

Every page below opens a puzzle straight away in your browser. Puzzles are made on your device from a puzzle number, so a link or a reprint gives the same puzzle, and a solver checks each one before it is shown.

Logic grid puzzles

Match every person with one item from each category using only the clues (also called Einstein, zebra or deduction puzzles). Every grid has exactly one solution.

• Logic grid puzzle maker — every size from 3x3 to 5x6, Easy to Expert.
• Logic puzzles (home page) — a 4x4 grid ready to play, plus the full list of tools.
• Easy logic puzzles for kids — 3x3 to 4x4 grids with a drop-down answer table and large print.
• Hard logic puzzles — 4x5 to 5x6 grids at Hard and Expert level.

Puzzles with a solver

• Knights and knaves — knights always tell the truth, knaves always lie; generate puzzles, check your own, print sheets.
• River crossing puzzles — wolf, goat and cabbage, missionaries and cannibals, jealous husbands, bridge and torch, family crossing.
• Water jug puzzle — measure an exact amount by filling, emptying and pouring, with the shortest solution.
• Mastermind code breaker — find the secret colour code from black and white pegs; the computer can also guess yours.
• Matchstick puzzles — move, remove or add sticks to make an equation true.

To print

• Logic puzzles with answers — a mixed pack of logic grids, knights and knaves and matchstick puzzles with an answer key, ready to save as a PDF.

Each tool page also explains the rules and how to solve the puzzle, with a worked example produced by the tool itself.