The History of Futoshiki
A Japanese number puzzle whose name simply means inequality: a Latin square with small signs between the cells.
A Name That Says It All
Futoshiki is the Japanese word for an inequality. The puzzle is played on a Latin square - the same grid as Sudoku without the boxes, or Calcudoku without the cages - and the only extra clues are the signs between the cells.
From Japan to the Newspapers
Like many number puzzles of its kind, it became known in Japan first. In the wake of the Sudoku boom of the mid-2000s, newspapers and puzzle magazines elsewhere began to print it as well.
On PaperGames
Every puzzle here is generated on your device and checked to have exactly one solution that can be reached without guessing. The signs are drawn as small triangles rather than typed characters, so they stay large and clear on an e-ink screen.