A little order.
A lovely puzzle.

Every number has its place.
Let the inequalities show you where.

THE RULE IS SIMPLE

Small signs.
Big deductions.

The pointed end of each sign faces the smaller number. The open side faces the larger one.

2<4two is less than four

SELECT A CELL, THEN A NUMBER

A few useful details

Dark numbers are fixed clues. Click a blank square and choose a number, or type it. Arrow keys move the selection; N toggles pencil notes; Delete erases; U undoes.

Vertical signs work the same way: ∧ means the top number is smaller; ∨ means the top number is larger. Coral marks show duplicates or inequalities that do not hold yet.

No guessing required. Each study has exactly one solution. Reveal one gives a single answer and marks the study assisted.

Source & credits

Futoshiki, adapted from Unequal in Simon Tatham’s Portable Puzzle Collection. Original C generator and solver by Simon Tatham and contributors; MIT license. Browser interface and local progress adapted for this edition.

GitHub: chrisboyle/sgtpuzzles · app/src/main/jni/unequal.c. Read the license.

A little order.A lovely puzzle.

Everything in its place.

A little order.
A lovely puzzle.