Futoshiki

Add to website Metainformation

Other games

Futoshiki puzzle

Futoshiki puzzle

The list of the most popular Japanese puzzles, along with Kakuro and Sudoku, includes the game Futoshiki. Its rules are simple and straightforward, but the solution requires serious mental work and concentration.

If even a beginner can handle small 5x5 puzzles, large playing fields (from 8x8) are only suitable for intellectual players.

Like most other Japanese puzzle games, Futoshiki is ranked in difficulty based on board size, and can be great fun for players of all ages and nationalities!

Game history

Futoshiki was first published in the Japanese magazine Nikoli in 2001. The name of its author is Tamaki Seto. The game he invented is also often called “More or Less,” and in Japanese its name (不等式) is translated as “inequality.”

Nikoli has made hundreds of games famous, and Futoshiki is one of them. In just over 20 years of existence, the game has conquered the whole world; today it is published in Germany, Great Britain, the USA, and dozens of other countries.

The Futoshiki puzzle is so popular that it is included in logic game championships and competitions every year. For example, The World Puzzle Championship, where players compete in the speed and accuracy of solving Futoshiki and other puzzles. The tournament is divided into several rounds and ranked according to the difficulty of the game, which directly depends on the size of the playing field.

Another world championship that is not complete without Futoshiki is the World Puzzle Cup. The winners can count on valuable prizes: cups and cash rewards. A similar championship is also held annually in the United States, where the speed and accuracy of solving puzzles are assessed.

A game included in tournaments and championships cannot do without records and record holders. In the case of Futoshiki, we can list three of the most prominent experts and winners:

  • Thomas Snyder. Known as "the world's fastest puzzle solver." At one time, he set a world record by completing a puzzle of 1000 pieces in just 3 minutes, and today he maintains a thematic blog where he shares his gaming experience.
  • Serkan Yurekli. A famous Turkish programmer and mathematician who solved many Futoshiki puzzles against the clock.
  • Palmer Mebane. This American mathematician composed more than a thousand puzzles, including Futoshiki.

In a relatively short period of existence (only 23 years), the puzzle was published in dozens of publications around the world, and separate books and collections were dedicated to it. The most famous are “The Big Book of Futoshiki” with 500 variations of this game and step-by-step instructions for solving them, and The Times Futoshiki Book - an official collection from the British newspaper The Times, including 200 variations of Futoshiki. Another well-known collection is PuzzleLife Futoshiki Magazine, which contains 100 Futoshiki games of different difficulty levels.

Largely thanks to the participation of major world publishing houses, this game is now known to all fans of logic games. Start playing Futoshiki right now (for free and without registration)! We believe you will succeed!

How to solve Futoshiki puzzle

How to solve Futoshiki puzzle

The playing field of the Futoshiki puzzle is a square divided into cells of the same size. The number of rows and columns is always the same, and determines the difficulty of the game. So, the larger the playing field, the more difficult it is to solve the puzzle.

The essence of the game is to fill empty cells with numbers, so that each row and each column contains their full set. For example, on a playing field 5 cells wide, this set will include numbers from 1 to 5, and on a playing field 9 cells wide, from 1 to 9. The order of the numbers can be any (arbitrary), and the main thing is that they are not repeated. in one line.

General rules

At the very beginning of the game, some of the cells are filled with numbers, and between some cells there are signs >, <, =. Accordingly, they mean that the number in the adjacent cell is greater than, less than, or equal to a given numerical value. Without these clues, solving the puzzle would be impossible, but they are not so common: approximately between 30-40% of the cells.

To solve Futoshiki correctly, you need to follow 4 basic rules:

  • You can fill in empty cells only with those numbers, the set of which is limited by the length/width of the playing field. So, for a 4x4 field the maximum number is 4, and for an 8x8 field the maximum number is 8.
  • Each horizontal row and each vertical column must contain one digit from the set. It is not allowed to have two twos and three fives in one row/column.
  • No two adjacent squares can contain numbers that differ by more than one.
  • Signs between cells must be strictly observed. So, if there is a < sign between the top and bottom cells, the number in the first must necessarily be less than the number in the second.

For every puzzle there is only one correct solution. The player’s task is to find it using the method of selection and deduction, without violating any of the rules described above.

How to solve the puzzle

Experienced Futoshiki players have developed winning techniques that can help solve difficult variations:

  • X-Wings technology. Search two rows/columns for two identical possibilities for a certain number, for example - 3 and 9. If they form an X-shape in the grid, you can eliminate other possibilities for that number in the same two rows/columns.
  • Swordfish technique. If three rows or columns contain three identical possibilities for a given number (for example, 2, 5, or 8) and they form a straight line in the grid, you can exclude other possibilities for that number in the table (the same three rows or column).
  • Jellyfish technique. The most complex of these techniques, requiring finding four possibilities for four rows/columns. If they form a square on the field, you can rule out other possibilities for that number in the same four rows/columns.

These techniques are applicable to complex (7x7, 9x9 and more) Futoshiki puzzles, and are not relevant for small playing fields. If we talk about general tips that apply to fields of any size, then these include the following:

  • Always start the game by looking for obvious clues. That is, from cells adjacent to filled cells, and from those next to which there are signs >, < and =.
  • Since the principle of the game is to go through possible options, it is convenient to use pencil marks or multi-colored filling of cells.
  • Enter the final number only when all other possibilities for a given cell have been ruled out.

Whether this game is right for you, you can only be sure in practice. Practice on small puzzles, and if successful, move on to more complex ones. This game will leave few people indifferent, and will be a great way to spend your leisure time!