For minds that like to wander

A little pause.
A good thought.

The coffee is ready. Your mind is still busy. A few empty squares, a little logic – and the world can wait a moment.

Solve your first Sudoku Discover four logic puzzles

140 free puzzles
No sign-up
Made for a coffee break

For five minutes.
Or until the coffee gets cold.

Your first puzzle break

The first square is yours

Classic · Beginner · Puzzle 1 of 5

Loading puzzle.

Choose a square, then a number. Use the arrow keys or tap the board.

Play all 60 Sudoku

The free puzzle section

No download. No sign-up. Just begin.

01—60

One grid. Three ways to play.

Classic, Killer or Samurai: 60 Sudoku across four levels. With pencil notes, error checking and a helping hand when you need one.

Explore the Sudoku

61—140

Four squares to think outside.

Futoshiki, Skyscrapers, Magic Square and Calcudoku. 80 puzzles, from your first certain number to a satisfying final deduction.

Explore the logic squares

The apps behind the puzzles

Take your break with you.

01 / Sudoku Pro

Don’t just solve.
Understand.

A hint can do more than reveal a number. Sudoku Pro explains the technique behind it, right on your puzzle. With a learning path through 20 techniques, Killer and a newspaper edition for iPad.

For iPhone & iPad
One purchase, no subscription
Offline, without ads

View on the App Store Meet the app

The newspaper edition and Samurai are available on iPad.

Sudoku Pro newspaper edition on iPad — Actual screenshot from the app

02 / Quadrivium

One square.
Four perspectives.

Quadrivium generates every puzzle afresh. You choose the size and level; the hint explains the next logical step. Futoshiki, Skyscrapers, Magic Square and Calcudoku in one app.

Four puzzle types
Solvable with logic
No ads or subscription

View on the App Store Meet the app

Quadrivium Futoshiki board on iPhone — Actual screenshot from the app

A little column for curious minds

The quiet pleasure of a certain number.

A good logic puzzle never asks for a lucky guess. There is a reason for the next move. Perhaps you haven’t found it yet. Perhaps it is hiding in the corner you just overlooked. Then, suddenly, one number fits. And then another.

The browser puzzles are a fixed, pre-checked selection. Sudoku Pro and Quadrivium generate new puzzles right on your device. Their hints explain how to find the way forward.

Room for another round?

Two more games from the same desk.

03 / Picture matching

Matching Game for All

A familiar idea with a few twists: find pairs, try rotating cards or match three pictures at a time. Eight theme sets and four modes for curious minds of all ages.

View on the App Store

Matching Game for All – Actual screenshot from the app

04 / Nonogram

NonoQuest

Numbers become pictures: 190 handcrafted nonograms in 19 campaigns, including color puzzles. With hints that explain, a retro look and a free start.

View on the App Store

NonoQuest – Actual screenshot from the app

One desk. Plenty of good puzzles.

I’m Tobias, and I make these apps myself. I like games that fit into a break without interrupting it with ads. This is a place to try them at your own pace.

More about me

Good to know

Are the browser puzzles really free?

Yes. All 60 Sudoku and 80 logic squares can be played without a purchase or an account. The apps are a separate offer on the App Store.

What is different in the apps?

The browser contains a fixed selection and can reveal cells. Sudoku Pro and Quadrivium generate new puzzles and use their hints to explain the next logical step.

Can I play on my phone?

Yes. Tap a square and use the number buttons below the board. A larger screen is comfortable for the big Samurai grid.