What is Equilux?
Equilux is a free daily logic puzzle about perfect balance: fill the 6×6 grid with suns and moons until every row and column holds exactly three of each. The name comes from the equilux — the day when daylight and darkness are equal.
- Balance every line Each row and column gets exactly 3 suns and 3 moons.
- Never three in a row No three identical symbols may touch, across or down.
- Respect the signs Cells joined by = match; cells joined by × differ.
- Pure logic One unique solution, always solvable without guessing.
If you know tango-style puzzles — the sun-and-moon game popularized by LinkedIn, or classic Binairo and Takuzu — you already know how to play. Equilux adds what daily players keep asking for: unlimited free puzzles in three difficulties, a playable archive of every past daily, and a hint system that teaches the logic instead of just filling in a square.
Frequently asked questions
Is Equilux really free?
Yes — the daily puzzle, unlimited mode, the archive, and hints are all free to play in your browser. No account needed. Your progress and streak are saved on your device.
Is this the same game as LinkedIn's Tango?
Equilux follows the same well-known binary-balance rules, so fans of Tango will feel at home. Equilux is an independent game and is not affiliated with or endorsed by LinkedIn.
What happens if I miss a day?
Your streak resets, but the puzzle doesn't disappear — every past daily stays playable forever in the archive.
Are the puzzles the same for everyone?
Yes. Each date has one fixed puzzle worldwide, so you can compare times with friends — and it's the exact same puzzle in the Equilux iOS app.