Every row. Every column.
Fill the eight raised cells in each row and column with 1–8. Each number appears exactly once; ignore the gaps.
NOW AVAILABLE ON GOOGLE PLAY
PLAY CYCLIC
SQUARE FREE
Discover a new kind of Sudoku challenge.
Play Square free here, or take all three editions with you on Android.
FREE TO PLAYPLAY FREE
Get it on Google Play ↗Square is free. Triangle and Jigsaw are separate one-time unlocks in the Android app. No subscription.
YOUR MOMENT OF FOCUS
Make room for a little play.
Square
Easy · Square #2494 · Guided editionTIME 00:00MISTAKES 0HINTS USED 0CELLS LEFT 99
Only the raised cells are playable.
Select a cell, then choose a number.
THE PUZZLE LIBRARY
Pick your next little escape.
Square: Available Now · FREE TO PLAY. Triangle and Jigsaw: COMING SOON.
A FEW SIMPLE RULES
Less guessing.
More discovering.
One shared rule, three different region shapes. Here’s how to play Cyclic Square.
Give it a go ↗One of each in every region.
Square boxes, triangles, and stepped jigsaw regions each contain eight cells. Each region must contain 1–8, with no repeats. The printed clues stay fixed.
Take it one possibility at a time.
Use Notes to mark candidates. Need a nudge? A hint reveals the selected cell, or the next empty cell. Incorrect entries count as mistakes.
SAME CURIOSITY. NEW POSSIBILITIES.
Think outside
the square.
Cyclic Square Sudoku gives familiar numbers a distinctive geometric home. Its raised cells form hollow squares across the board, while square boxes, triangles, and jigsaw regions offer three different ways to play.
This is the beginning of that journey: a home for the puzzles, the people who solve them, and those lovely moments when everything clicks.
128 raised cells. Eight numbers. Three perspectives.CYCLIC SQUARE IN PRINT
Turn the page.
Find a new challenge.
Cyclic Squares: The Discovery of a New Combinatorial Structure
Buy the book on Amazon ↗
Cyclic Square Sudoku: The Jigsaw Edition (Cyclic Square Puzzles)
Buy the book on Amazon ↗
Cyclic Square Sudoku Puzzles for kids and young adults (Cyclic Square Puzzles)
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Cyclic Square Sudoku: The Triangular Box Edition (Cyclic Square Puzzles)
Buy the book on Amazon ↗
Cyclic Square Sudoku Puzzles (Cyclic Square Puzzles)
Buy the book on Amazon ↗Explore editions, current prices and availability on Amazon. Links open in a new tab.
THE NEXT CHAPTER
More ways to find your flow.
A whole book of
“just one more.”
Explore the Cyclic Square books, from puzzle collections to the mathematics behind the designs.
Browse the books ↗Your next puzzle.
In your pocket.
Cyclic Square Sudoku is now on Google Play. Enjoy Square for free, with Triangle and Jigsaw available as separate one-time premium unlocks.
Get it on Google Play ↗One payment per premium edition. No subscription.
Curious minds.
Shared discoveries.
Join us on X for puzzle challenges, solving tips and app news.
Follow @CyclicSquare on X ↗LET’S TALK PUZZLES
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