Do you Zudo?
A new dimension
in SUDOKU!
ZudoCube is Sudoku, rebuilt as a cube or squished flat. Six faces share edges and corners — every number you place echoes across three faces at once, turning each cube into one giant puzzle.
9 × 9 — №009
6
Interlocking faces
729
Cells per puzzle
∞
Daily puzzles
2026
Made in California
The idea
What if the puzzle on the page had a back?
Sudoku is one of the most beloved puzzles on earth. We thought it deserved another axis. Every face of a ZudoCube is a complete Sudoku grid — but the edges and corners share the same numbers. Solving one face nudges three others.
Read the story
Three ways in
Pick your medium.
Object
The physical cube
Premium cardstock, a simple cardboard cube you can hold in yoour hands: 4×4, 6x6, 8x8, 9×9, 12x12 and 16×16.
From $19
Shop cubesSoftware
Web & mobile
Play, save progress, and get hints from the same engine. Free to use.
Free
Play nowRitual
Daily by mail
One new puzzle delivered to your inbox every morning. Monthly subscription.
From $4 / mo
Subscribe
Morning ritual
A puzzle with your coffee.
Subscribe and a new puzzle arrives every morning — in your inbox or physically delivered to you in your hands. Built around the rhythm of your day, not a streak counter.
- New 9×9 daily puzzle, hand-curated for difficulty
- Pause anytime; cards keep coming in the mail
- Free physical cube every quarter
- Solve in the browser, on iOS, or with pencil and paper
The app
In your pocket.
The same wave-based solver, the same hand-tuned hints. Free in your browser, offline on iOS. No streaks, no ads, no nudges.
Engine
Rust + WebAssembly
Web app
Free
iOS app
Free + IAP
Desktop
Coming soon
The first genuinely new Sudoku variant in a generation.
A small, beautiful object — and a fiendish puzzle.
My new morning ritual.
Do you Zudo?
The cube is patient. It will wait.
Try the web game free, or order your first cube. Either way, no streaks, no notifications, no nudges. Just a quiet hour with a puzzle.