Sudoku: Variants & Classic

Sudoku & Variants by Logic Wiz: Free Sudoku, Killer, Sandwich, Thermo & Logic Puzzles

NEW: the SET level is here! (Premium)
Think in sets. Solve like a mathematician.

The new SET level brings puzzles and strategies built on Set Equivalence Theory (SET), the mathematics behind the famous Phistomefel Ring. Every SET puzzle needs a set idea to crack it, so each board teaches you a new way to see Sudoku. SET puzzles come as classic Sudoku and as variant Sudoku. When the usual chains run dry, SET finds the move.

Ready to solve like the experts? Open the SET level and try one today.


Looking for the best free Sudoku app? Discover Sudoku & Variants by Logic Wiz, a relaxing and brain-boosting logic puzzles and number puzzle game. Whether you are a beginner searching for a Sudoku game or a puzzle master hunting for the next challenge, this app gives you a daily mental workout.


Inspired by Cracking the Cryptic

Fans of Cracking the Cryptic and the global puzzle community will feel right at home. Every puzzle is handcrafted, has one unique solution, and rewards deep logic instead of guessing. Pro-level puzzles, now on your phone.


Play Every Sudoku Variant

Enjoy your classic Sudoku puzzle, then dive into the world of Sudoku variants:

• Killer Sudoku: A thrilling mix of Sudoku and arithmetic.

• Sandwich Sudoku: Use the crust clues to find the filling.

• Arrow Sudoku: Follow the arrows for a unique logic twist.

• Jigsaw Sudoku: Also known as Irregular Sudoku, where regions are not just squares.

• Thermo, Windoku, Palindrome, Kropki, Chess and more: Each variant is a fresh challenge for your brain.


Features to Help You Level Up

• Free Sudoku & Logic Puzzles: Thousands of handcrafted boards.

• Smart Hints: Hints that do not just give the answer. They explain the logic behind the next move, so you learn and improve.

• Handcrafted Boards: Every puzzle is designed by Logic Wiz and is a unique logic game.

• Weekly Challenges: A new theme and fresh puzzles every week.

• Offline Sudoku: Play your favorite number puzzles anywhere, with no internet connection.

• Levels for Everyone: From Beginner to Master, and now the SET level for the true experts.


All the Sudoku Variants

Classic Sudoku, Killer Sudoku, Sandwich Sudoku, Jigsaw (Irregular) Sudoku, Thermo, Slow Thermo, Diagonal, Arrow Sudoku, Windoku, Skyscraper, Zipper Lines, X-Sum, Little Unique Killer, Consecutive, Non-Consecutive, Palindrome, Kropki, German Whispers, Dutch Whispers, Chess Knight, Chess King, Bishop, Greater-Than, XV, Reflection, Quadruple, Slingshot, Even-Odd, Between Lines, Lockout Lines, Running Cells, Ascending Sequences, Renban, Universal, Couples, Twisted Consecutive, Axia, Vertex, Index Lookup, Friendly Cells, Dutch Flatmates and Pulse.

New variants arrive all the time.


More Game Features

• Multiple variants on a single board for ultimate complexity.

• Cloud Sync: never lose your progress on any device.

• Dark & Light themes for day or night play.

• Advanced pencil marks with multiple styles and auto-removal.

• Combinations Panel: essential for Killer Sudoku and Sandwich Sudoku solvers.

• Statistics and performance tracking to watch your logic skills grow.


A fan of mind games, strategy puzzles or daily brain training? Logic Wiz is the free Sudoku app you have been looking for, however you spell it: sudoku, soduku or sudoko. Download today and join the community of solvers who love the art of logic puzzles!

Recent changes:
A New Logic Wiz Update Is Here!

Think in sets. Solve like a mathematician.
We added puzzles and strategies built on "Set Equivalence Theory" (SET), the mathematics behind the famous Phistomefel Ring.

- New SET Level (Premium) - for classic and variant puzzles
- More Puzzles - new puzzles across all difficulty levels
- Even Better - various enhancements, improvements, and bug fixes

Explore. Think differently. Challenge your logic!