Polus

Polus is a Galaxies logic puzzle — also published as Tentai Show — for people who want a board they can think their way through rather than poke at.

The grid is scattered with stars. Draw lines along the grid to cut the board into galaxies: every galaxy holds exactly one star and is balanced around it, so for every square in it, the square straight across the star — the same distance away — is in it too. When you are done, every square belongs to exactly one galaxy.

A star can sit in the middle of a square, on the line between two, or on the corner where four meet — and that is the whole difficulty.

No guessing, ever

Every puzzle has exactly one solution, and every solution can be reached by deduction alone. Each one is verified by a solver that only uses techniques a human can actually follow. The hint button is held to the same rule: it only ever shows a move you could have worked out yourself.

A weekly rhythm

Gentle on Monday, demanding on Sunday. Every day you solve fills a square on the month’s calendar, and filling in a whole month earns its trophy. Miss a day and you can still play it from the calendar — catching up is the ordinary way to play, not a penalty.

Free, and fair about it

Polus is free and supported by ads. One purchase removes them for good and makes hints unlimited — there is no subscription, and nothing in the game is locked behind it. The daily archive is free for everyone, because catching up on a missed day is how the month is meant to be filled.