🧩 Binairo Master 10×10

<p>The grandmaster ten-by-ten board — a sprawling binary-logic challenge for solvers who love a deep, clue-light puzzle. Binairo Master 10×10 is a binary logic puzzle (also called Takuzu) where you fill the grid with suns and moons under three simple rules. Under the surface it's quietly training pure logic, balance-counting and pattern elimination. Bite-sized rounds and steadily climbing scores give it that moreish, come-back-tomorrow quality that brain games live on. Lightweight and polished, it's designed to delight casual players and hardcore puzzlers across the globe. It runs instantly in your browser on phone, tablet or desktop with no download, no install and no sign-up. Controls are dead simple to learn but the depth keeps revealing itself the more you play. It sits comfortably alongside the other thinky games in our collection if you fancy a change of pace. Your best result is saved locally, so each visit you're really racing the toughest opponent of all — yourself. Beat a personal record and the built-in share buttons let you challenge a friend on WhatsApp or Telegram in one tap.</p>

How to play

• Tap a cell to place a ☀️, tap again for a 🌙, once more to clear it.
• Never put three of the same symbol in a row or column.
• Each row and column must hold equal suns and moons.
• Use those two rules to deduce forced cells.
• Fill the whole grid correctly to solve it.

Controls

Tap a cell to cycle it through sun, moon and blank. Use the row and column rules to deduce every square.

Features

• Uniquely-solvable sun & moon grids
• Logic-only — never a guess needed
• Best-time tracking
• Several grid sizes for rising difficulty

FAQ