Play Detective Logic Puzzles Online Free
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About Detective Logic Puzzles
Detective Logic Puzzles are grid deduction puzzles — the format sometimes called 'logic grid' or 'zebra' puzzles. You're given a set of clues and a grid of possibilities, and you mark ticks and crosses until only one arrangement is consistent with everything you've been told.
The detective framing gives each puzzle a story, but the solving is pure logic: no guessing is ever required, and every deduction follows from a clue you already have.
How to play Detective Logic Puzzles
- Mark
- Click a grid cell to cycle tick, cross and blank
- Hints
- The hint list beside the grid
- Read the clues listed beside the grid.
- Mark crosses for impossibilities and ticks for certainties.
- A tick in one cell means crosses across the rest of that row and column.
- Complete the grid to solve the case.
Detective Logic Puzzles tips
- Mark every cross a clue implies, not just the tick — the crosses are what narrow the grid.
- Re-read clues after each deduction; they mean more once the grid is partly filled.
- Never guess. If you're stuck, there's a clue you haven't fully applied.
- Work the clue that mentions the fewest possibilities first.
Detective Logic Puzzles — questions
What is a logic grid puzzle?
A deduction puzzle where a set of clues determines a unique arrangement of categories. You mark ticks and crosses on a grid until only one consistent solution remains — no guessing is ever needed.
How do you get started when stuck?
Re-read the clues from the beginning. Each deduction changes what the earlier clues imply, so a clue that told you nothing at first often becomes decisive later.
Does it work on a phone?
Yes — tap grid cells to mark them. Nothing to install.
- Categories
- Puzzle
- Platform
- Web browser — desktop, mobile, and Chromebook
- Cost
- Free, no download or sign-up