600 Futoshiki

600 Futoshiki is our main Futoshiki series: 600 puzzles in every book, across three books that rise in difficulty. Fill each row and column once and keep every inequality sign true. The rules are simple, the logic is surprisingly deep, and there's no arithmetic at all.

Pick the level that suits you. Easy to Hard starts gently and is the place to begin if you're new to Futoshiki. Medium to Very Hard is for regular solvers who want a steady challenge. Hard to Extreme is for experienced solvers who want long chains of reasoning and puzzles that hold out to the end.

With 600 puzzles, a single book lasts a long time. When you've finished one level, move up to the next. Once Hard to Extreme feels comfortable, Hard Core Futoshiki 400 gives you a full book of hard puzzles.

All three books are printed at 8.5 x 11 inches. For bigger print with one puzzle per page, see 157 Large Print Futoshiki. Our guide to solving Futoshiki explains the rules and works through the main techniques, from the smallest and largest values to chains of signs.