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Play Futoshiki

Futoshiki is a logic puzzle game from Japan, also known as More or Less or Unequal. It was developed in 2001 by Tamaki Seto. Futoshiki literally means inequality in Japanese, referring to the inequality signs between squares on the grid. It is also sometimes spelled as hutosiki.

Like many other puzzles you have to fill each square in the square grid, with each digit only appearing once in every row and column. What makes Futoshiki special is that the numbers in the grid should honour the inequality signs between the squares.

How to play
Algerian Patience App Store Play Store
Algerian Patience App Store Play Store
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Futoshiki

Futoshiki

SolitaireParadise. is free to use, but not to operate.
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SolitaireParadise. is free to use, but not to operate.

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SolitaireParadise. is free to use, but not to operate.

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Futoshiki game info

Rules

The digits on the board should form a Latin square when completed.

Difficulties

There are three difficulties of Futoshiki puzzles in our implementation: Easy, Medium, and Hard.

The Easy puzzles are smaller and have more information that will help you solve the puzzle (starting numbers and inequality signs). The Medium and Hard puzzles are larger in size (up to 9x9). Hard puzzles have fewer starting numbers and fewer inequality signs than Medium puzzles.

How to solve a Futoshiki puzzle?

Solving a Futoshiki puzzle requires logical reasoning. It is best to use pencil marks indicating the remaining possibilities for a cell. With logical reasoning, you can reduce the possibilities for a cell until there is only one possibility, or if a number is only possible for one cell in a row or column.

There are two types of information that can be used to solve the puzzle:

One useful pencil mark technique you can use is called AB elimination. If you have two cells in a row (or column) that both have two equal remaining possibilities, you can remove them from the other cells in that row (or column).

For example, if you have a row with four open cells, having possibilities {1,2} - {1,2} - {1,3,4} - {2,3}, you know that the 1 and 2 will go into the first two, so you can remove them from the possibilities of the other cells. The updated possibilities are: {1,2} - {1,2} - {3,4} - {3}.

How to start a Futoshiki puzzle?

The best way to start a Futoshiki puzzle is to look at the inequality signs. Sometimes you can immediately fill in certain cells, e.g. if it is smaller than 2 (you know for sure it must be a 1).

Once these are filled in, you can press the Add Pencil Marks button to automatically generate all possibilities for the grid squares. Now you have to iteratively reduce the possibilities in the cells until there is only one left.

Controls

You can either play with the mouse or with the keyboard.

Using the mouse, press a cell to select it, and select the number you want to fill in from the options above the grid.

With the keyboard, you can move around the grid using the arrow keys. If you want to fill in a number, just press the corresponding number key on your keyboard. There are some additional shortcuts:

Similar games

Futoshiki is similar to other logic puzzles such as Sudoku, Numbrix, and Str8ts.

System requirements

Futoshiki can be played in all modern browsers, on all device types (desktop, tablet, mobile), and on all operating systems (Windows, macOS, Linux, Android, iOS, ...).

Classification: HomeClassicFutoshiki
Rating: 84% (49 votes)
Developer: Solitaire Paradise
Technology: HTML5
Wiki's: Wikipedia