Futoshiki vs. Sudoku: What’s the Difference and How Do You Play?
If you enjoy Sudoku but want a number puzzle with a different style of logic, Futoshiki is worth trying.
Both puzzles ask you to place numbers into a grid without repeating them. The difference is in the clues. Sudoku relies on fixed starting numbers and smaller boxes, while Futoshiki adds inequality signs that tell you which neighboring number must be greater or smaller.
That small change creates a surprisingly different solving experience.
Futoshiki is a number-placement logic puzzle.
In a 6x6 Futoshiki grid, you place the numbers 1 through 6 so that:
Every row contains each number once
Every column contains each number once
No number repeats within a row or column
Every < or > sign between neighboring cells must be true
means the number on the left must be smaller than the number on the right.
You do not need advanced mathematics. Futoshiki is solved through observation, elimination, and deduction.
Sudoku is another number-placement logic puzzle, most commonly played on a 9x9 grid.
The standard version uses the numbers 1 through 9.
Your goal is to make sure:
Each row contains 1 through 9 once
Each column contains 1 through 9 once
Each 3x3 box contains 1 through 9 once
Some numbers are already placed in the grid when you begin. You use those numbers to work out where the remaining values belong.
Futoshiki vs. Sudoku: The Main Difference
The biggest difference is the type of information each puzzle gives you.
Greater-than and less-than signs
Futoshiki usually does not rely on 3x3 boxes.
Instead, the inequality symbols create relationships between neighboring cells.
you already know that the cell on the left cannot contain the largest number available, and the cell on the right cannot contain the smallest.
Those restrictions become increasingly useful as you solve more of the grid.
How to Read Futoshiki Inequality Signs
The inequality symbol always points toward the smaller number.
is correct because 2 is smaller than 4.
is correct because 6 is greater than 3.
You can think of the open side of the symbol as facing the larger number.
When the cells are still empty, the sign gives you a relationship rather than an exact answer.
does not tell you the two numbers immediately.
It only tells you that whatever number goes in the first cell must be smaller than whatever number goes in the second.
How to Solve a 6x6 Futoshiki Puzzle
A 6x6 puzzle uses the numbers:
Each number must appear once in every row and once in every column.
Here are a few useful ways to begin.
Look for Rows With Several Numbers Already Filled
Suppose a row already contains:
Only one number is missing.
This is the same kind of elimination you might already use in Sudoku.
Suppose an empty cell must be greater than 5.
In a 6x6 puzzle, the only possible answer is 6.
Likewise, if a cell must be smaller than 2, the only possible answer is 1.
Inequality signs become especially powerful near the highest and lowest numbers.
Sometimes several inequality signs connect neighboring cells.
You now know the numbers must increase from left to right.
If the puzzle only has a few possible numbers remaining in that row, the chain can greatly reduce your choices.
A longer relationship such as:
places even stronger limits on which numbers can fit into each position.
Check Both the Row and Column
Never solve a cell using only one direction.
A number might fit the row but already appear somewhere else in the same column.
Before placing a number, check:
Does the number already appear in the row?
Does it already appear in the column?
Does it satisfy every nearby inequality sign?
All three conditions must work.
What Makes Futoshiki Feel Different From Sudoku?
“Where can this number go?”
Futoshiki frequently adds another question:
“How does this number compare with the cells beside it?”
That makes the puzzle feel more relational.
You are not only looking at individual numbers. You are also looking at the relationships between them.
For people who already enjoy Sudoku, this creates a familiar but noticeably different challenge.
Is Futoshiki Harder Than Sudoku?
It depends on the puzzle.
Both Futoshiki and Sudoku can range from beginner-friendly to extremely challenging.
An easy 6x6 Futoshiki puzzle might have plenty of given numbers and inequality clues.
A harder puzzle gives you fewer obvious placements and requires you to combine several clues before making progress.
Difficulty also depends on your experience. A regular Sudoku solver might immediately recognize row and column elimination, while inequality chains take a little more practice.
Do You Need to Be Good at Math?
Futoshiki uses numbers, but solving it does not require calculations, equations, or advanced mathematics.
The numbers act more like symbols.
You mainly need to understand:
Which numbers are available
Which numbers are already used
Which number must be greater
Which number must be smaller
The puzzle is about logic rather than arithmetic.
Which Puzzle Should You Try?
Working with rows, columns, and boxes
Finding exact positions through elimination
Try Futoshiki if you enjoy:
Comparing neighboring cells
Smaller grids with concentrated deduction
And if you already enjoy Sudoku, Futoshiki is an easy puzzle type to add to your rotation because many of the basic elimination skills carry over.
A Simple Futoshiki Strategy for Beginners
When starting a puzzle, work in this order:
Fill any row or column with only one missing number.
Check inequality signs involving 1 or 6.
Look for chains of multiple inequality signs.
Eliminate numbers already used in each row and column.
Recheck the grid after every new placement.
One solved cell often creates a new clue somewhere else.
Looking for More Futoshiki Puzzles?
If you want a larger collection to work through, Futoshiki 6x6 Logic Puzzles by Prynne Fun Publishing includes 160 puzzles arranged across four difficulty levels.
160 Futoshiki 6x6 puzzles
Easy, Medium, Hard, and Very Hard levels
Gradually increasing difficulty
No advanced mathematics required
It is designed for adults, Sudoku fans, number-puzzle lovers, and anyone looking for a screen-free logic challenge.
Futoshiki 6x6 Logic Puzzles is available on Amazon.
One More Number Puzzle to Add to Your List
Sudoku and Futoshiki share the same satisfying idea: every number has one correct place.
Sudoku gives you boxes to consider. Futoshiki gives you inequality relationships.
If you already know Sudoku, learning Futoshiki takes only a few basic rules. The challenge comes from learning how to combine those rules efficiently.
Start with an easy 6x6 grid, follow the signs, and see where the logic takes you.
