A LITTLE LOGIC GOES A LONG WAY
How to solve logic grid puzzles
Learn how to read the clues, use checks and crosses on the grid, and find each new match. Start with a small puzzle, then explore one deduction at a time.
Match things together
Each person has one item from each group. Every item is used once. The clues tell you which things belong together.
Keep track on the grid
Use a ✓ for a match and a × for something you have ruled out. Leave a square empty when you do not know yet.
Build on what you know
Every new mark can help you find another. You do not need to guess. Look for a step you can explain.
FEEL AT HOME ON THE GRID
How the controls work
Make a mark. Tap or click an empty square once for ×, again for ✓, and again to clear your mark.
Undo a step. Use Undo to take back your last change.
Cross off a clue. Once all of its information is on the grid, cross it off to keep your place. This does not change the grid.
Notice the lighter marks. When you enter a ✓, ClueKiln crosses out the other choices in that row and column. These lighter marks follow from your match.
Get help when you want it. Check can point out wrong marks. Reveal shows the answer and ends that attempt. The tutorial is a separate practice space.
START SMALL. BUILD YOUR SKILLS.
A guide you can try.
Follow a complete solve, or pick one idea to practise. There is no timer, score, or sign-in needed.
Starting out
Reading clues
- 3 steps
A list of different people
Clue type: Multi-elimination clue
- 2 steps
Neither of these
Clue type: Neither/nor clue
- 2 steps
Read an either/or clue
Clue type: Either/or clue
- 3 steps
One of each
Clue type: Unaligned pair clue
- 3 steps
Before and after
Clue type: Greater/lesser than clue
- 3 steps
An exact gap
Deduction: Exact-difference reasoning
- 3 steps
Next in the list
Clue type: Ordinal adjacency
- 3 steps
Add two amounts
Clue type: Sum clue
Finding more matches
- 2 steps
Only one choice is left
Deduction: Single remaining option
- 2 steps
Carry a match to another section
Deduction: True transposition
- 2 steps
Carry a cross to another section
Deduction: False transposition
- 3 steps
Two people, two choices
Deduction: Pseudo-true pair (aligned)
- 3 steps
Three people reserve three choices
Deduction: Restricted triple
- 2 steps
No shared choice: parallel rows
Deduction: Parallel cross elimination
- 2 steps
No shared choice: a row and a column
Deduction: Skewed cross elimination
- 3 steps
One time must be used
Deduction: Pseudo-true pair (staggered)
Combining clues
- 2 steps
Both choices rule it out
Deduction: Transitive relationships (either/or)
- 3 steps
Carry facts through a pair
Deduction: Transitive relationships (unaligned pair)
- 3 steps
Leave room for a whole chain
Deduction: Comparative relationships
- 3 steps
Use a complete list again
Clue type: Multi-elimination clue
- 3 steps
Keep a useful note
Solving habit: Taking notes
Positions
Practice and review
Go at your own pace
Work through the lessons in order, or pick one idea you want to practise. Each lesson ends with a link to the next. Small examples may leave squares empty: the explanation tells you which deduction to look for.