Sudoku

Sudoku is a modern number puzzle app with a clean design, relaxing background music and everything you need to get better at the game, not just play it. Choose from 100,000 sudoku puzzles across five difficulty levels, from your very first grid to expert challenges that resist every simple approach. Every puzzle has exactly one solution and can be solved by pure logic, with no guessing at any point. And when you get stuck, this app does not simply hand you the answer: it walks you through the reasoning, one step at a time, right on the board. The idea behind sudoku is older than it looks. Latin squares were studied by Leonhard Euler in the 18th century, the modern puzzle appeared in 1979 under the name Number Place, and Japan gave it the name we all use today. In 2004 it reached the newspapers of London, and from there the whole world. There are 6,670,903,752,021,072,936,960 different completed grids, and a proper puzzle needs at least 17 clues, a fact that took mathematicians until 2012 to prove. In many languages the name is written differently: Sudoku, 数独, 스도쿠, Судоку, सुडोकू, سودوكو, סודוקו, Σουντόκου. The grid, though, is the same everywhere. Key Features • 100,000 sudoku puzzles on five difficulty levels: Beginner, Easy, Medium, Hard and Expert • Every puzzle has exactly one solution and is solvable by logic alone, never by guessing • A warm-up of 30 gentle puzzles for players who are new to sudoku • Interactive sudoku course: 12 lessons that teach 26 solving techniques, from your first move to advanced patterns • Learn Full House, Naked Single, Hidden Single, Naked Pair, Hidden Pair, Naked Triple, Hidden Triple, Naked Quad, Hidden Quad, Pointing Pair, Claiming, X-Wing, Finned X-Wing, Sashimi X-Wing, Swordfish, Jellyfish, XY-Wing, XYZ-Wing, W-Wing, XY-Chain, Simple Colouring, Remote Pairs, Unique Rectangle, BUG+1 and Almost Locked Sets • Smart hints that explain the reasoning step by step instead of just revealing a digit, and point out your mistake first if you have made one • Pencil marks (notes) with automatic clean-up of numbers that are no longer possible • Undo, eraser and a clear mistake counter with an adjustable limit • Highlighting of matching digits and of the current row, column and box • Scoring with a speed bonus, best scores and best times for every level • Daily streak, detailed statistics and flawless-game counters • Cloud save with Google Play Games: your progress moves with you to a new phone More Details • Make the board yours: four digit fonts, adjustable digit size, grid thickness and six grid colours • Light and dark theme, Material Design 3 interface • Relaxing background music, sound effects and haptic feedback, all optional • Lessons can be read aloud, in every language where your device has a voice • Your game saves itself, so you can put the phone down mid-puzzle and come back later • Harder levels unlock as you win, so you are never dropped into a puzzle you are not ready for • Optional daily reminder helps you keep your streak alive • Plays fully offline, no internet connection needed • Available in 60 languages, with full right-to-left support • Free to download and play, with an optional one-time purchase to remove ads • Respecting your privacy and the security of your data About Us • Visit SplendApps.com: https://splendapps.com/ • Facebook: https://www.facebook.com/SplendApps/ • Instagram: https://www.instagram.com/splendapps/ • X/Twitter: https://x.com/SplendApps