Overview
Hard Sudoku is classic 9×9 sudoku for players who got bored with easy long ago. Nine levels: Very easy, Easy, Medium, Hard, Very hard, Expert, Master, Extreme and Legend, where logic runs out and guessing begins.
The game holds 8200 puzzles: 1000 on every level and 200 on Legend. Each of them has exactly one solution — uniqueness is verified in advance, not by eye.
A hint does more than open a cell: it highlights the cells involved, names the technique and explains why the digit belongs there. Two equal digits in a row, a column or a block light up right away, and a grid check finds the mistakes that no conflict reveals.
Candidate notes, undo and redo, three input schemes to choose from, light and dark themes, sound for every action, Russian and English switchable at any time.
You can keep as many unfinished puzzles going as you like. Games and statistics travel through the cloud to any device. Leaderboards track solved puzzles, day streaks and the best time on every level.
Videos and screenshots
13,434 players online
How to play
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Open the game
Press Play now and the game opens on its own screen.
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Follow the in-game instructions
The controls and goals are shown inside the game as you play.
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Use the game menu
The floating button over the game reloads it, saves it to your favourites, or takes you back out.
