There are 37 million 4x4 Futoshiki puzzles, and together we're going to solve them all! So far, we've solved 17,561 puzzles.

Each puzzle will be solved just once, so the ones you solve belong exclusively to you! You'll get your own web page you can share with your friends that shows all the puzzles you've finished.

Futoshiki is a fun and addictive logic game. Our version is played on a 4x4 grid. Each row and column must have the digits 1-4 in it without repetition, much like Sudoku. Greater-than (>) and less-than (<) signs give you additional clues for filling in the grid.