Binary · Takuzu
Suns & Moons
Fill the grid with suns and moons: no three in a row, the same number of each per line, and no two identical rows or columns. Simple rules, satisfying chains of deduction.
A clean, calm hub of logic puzzles. Solve the same daily challenge as the rest of the world and race the clock on the leaderboard, or settle into a journey of hundreds of handcrafted levels. Every puzzle has exactly one solution.
A quick daily ritual and a long-haul journey — both built on pure logic, with no language barrier and no guessing required.
One puzzle per type per day — the same for everyone on Earth. Solve it, check your time on the global leaderboard and keep your streak alive.
Hundreds of handcrafted levels per puzzle type, growing with updates. Energy gives the run structure — refill it with an optional video.
Every board is generated and verified to have a unique solution. If you're stuck, it's logic you're missing — never luck.
A clean, distraction-free interface with full light and dark themes. Your eyes pick; the grid stays perfectly readable.
Play instantly as a guest. Sign in with Google only if you want — it backs up your progress and follows you to a new device.
Build a daily streak, earn stars, and share your result as a spoiler-free emoji card to challenge your friends.
Both are language-independent, deduction-only puzzles — easy to learn in one screen, deep enough to race the clock on.
Fill the grid with suns and moons: no three in a row, the same number of each per line, and no two identical rows or columns. Simple rules, satisfying chains of deduction.
Place exactly one piece in every row, column and colored region — no two touching. Drag to rule cells out with an X, then watch the only possible answer reveal itself.
More puzzle types join the hub in future updates.
A look at the hub, the puzzles and the daily leaderboard — in both themes.
Quaylo is in development and headed to Google Play — the daily puzzles are warming up.