eSudoku: Classic Sudoku

eSudoku: Classic Sudoku — Free, Offline, No Guessing

eSudoku (formerly Win eSudoku) is a free, offline Sudoku puzzle game built for real logic solving, not lucky guessing. Every puzzle is generated using genuine human solving techniques, the same deduction methods real solvers use, and verified to have exactly one solution reachable through pure logic. No brute-force boards, no dead ends, no 50/50 guesses disguised as difficulty.

WHY eSUDOKU IS DIFFERENT
Most Sudoku apps just remove random numbers from a solved grid and hope for the best. eSudoku's puzzle engine checks every board against real solving techniques, from naked and hidden singles through pairs, triples, and box-line reduction, up to advanced X-Wing, swordfish, and chain techniques, before it ever reaches your screen. Whatever difficulty you pick, the puzzle is guaranteed solvable step by step using logic alone.

SIX DIFFICULTY LEVELS
Easy, Medium, Hard, Expert, Master, and Grandmaster: a genuine difficulty curve for every kind of solver, from someone learning the rules to a puzzle veteran chasing a true logic challenge.

JOURNEY MODE
Travel through 500 levels across named regions, from gentle beginnings to an endless late-game run of Expert, Master, and Grandmaster boards for players who never want the challenge to end.

DAILY CHALLENGE & WEEKLY GOALS
A fresh Daily Challenge puzzle with streak tracking, plus Weekly Goals that reward you with bonus XP for hitting solving milestones.

FEATURES
• Six difficulty levels: Easy, Medium, Hard, Expert, Master, and Grandmaster
• Journey mode: 500 levels across named regions, plus an endless late-game
• Daily Challenge puzzles with streak tracking
• Weekly Goals with bonus XP rewards
• Achievements and player level progression
• Undo, erase, pencil-mark notes, and a built-in hint system
• Smart mistake tracking with a forgiving strike system
• Multiple board themes: Ocean, Forest, Sunset, Midnight, and more
• Detailed statistics: best times, streaks, and completion history
• Google Play Games leaderboards, achievements, and cross-device cloud sync
• Fully offline puzzle app: no wifi needed, no account required

A REAL BRAIN TRAINING GAME
eSudoku is a number puzzle and logic puzzle in one, a mind game you can pick up for two minutes or sink into for an hour, with a clean board, smooth controls, and nothing between you and the puzzle.

FREE TO PLAY
eSudoku is free to play with optional ads. Go Premium for an ad-free experience, plus extra hints and a more forgiving mistake limit on every difficulty.

Download eSudoku and put your logic to the real test.