Guide to how to solve logic grid puzzles

How to Solve Logic Grid Puzzles Without Guessing

Use direct clues, exclusions, single candidates, and deduction chains to solve logic grid puzzles methodically.

Murder sudoku puzzle board in Mystery Grid

Logic grid puzzles become easier when you record what cannot be true as carefully as what is true. A crossed-out option is useful information, not merely an absence.

Mystery Grid makes this reasoning tactile by placing suspects directly into a crime scene and providing possible, confirmed, and impossible marks.

01

Begin with the strongest clues

Exact positions, named rooms, fixed rows, and narrow spatial relationships usually remove the most uncertainty. Process them before vague or multi-step clues.

Mark consequences immediately. If a suspect is confirmed in one cell, exclude the rest of that row and column before reading further.

02

Look for single candidates

A suspect with only one remaining cell must occupy it. Likewise, if a required row or room has only one compatible suspect, that relationship is forced.

These two views—candidate by suspect and candidate by location—catch deductions that are easy to miss when you look at only one dimension.

03

Build short deduction chains

When no direct placement remains, test implications without guessing: if a clue restricts someone to two cells, note which rows and columns both possibilities would block.

Combine that shared consequence with other clues. You are not choosing between the two options; you are using what remains true in either case.

04

Recover from a contradiction

If a truthful clue becomes impossible, review the most recent confirmed mark. Players often confuse a plausible cell with a logically forced cell.

In Mystery Grid, keep uncertain cells marked as possible and use confirmed only when every alternative has been eliminated. The hint system can point you forward without replacing the solve.

Mystery Grid app icon

Put the guide into practice

Try it in Mystery Grid

Mystery Grid turns murder mysteries into fair, bite-sized logic puzzles. Read the clues, place each suspect, and reveal the culprit—no guessing, no gore, just deduction.

Download on the App Store

Common questions

FAQ

Is pencil marking important?+

Yes. Recording possible and impossible cells reduces memory load and exposes single-candidate deductions.

What should I do when stuck?+

Rescan every row, column, suspect, and room for a single remaining candidate, then revisit clues affected by the last confirmed placement.