Sudoku - 5 Types of Puzzles

Sudoku is a puzzle-solving app that works completely without an internet connection. Puzzles are generated directly on your device, and each one has a unique solution.

PUZZLE TYPES

Classic 9×9 — Standard rules: digits 1–9 in every row, column, and 3×3 block.
Sudoku 6×6 — A simplified version for beginners, featuring 2×3 blocks and digits 1–6.
Diagonal (X-Sudoku) — Classic rules with an additional condition: neither of the two main diagonals may contain duplicate digits.
Killer Sudoku — Cells are grouped into cages with a specified sum; duplicate digits are not allowed within a single cage.
Irregular (Jigsaw) — Instead of standard 3×3 blocks, irregularly shaped regions are used.

DIFFICULTY LEVELS

Each puzzle type is available in four difficulty levels: Easy, Medium, Hard, and Expert.

FEATURES

— Notes Mode: Place pencil marks in cells
— Hints: Reveal a single cell when needed
— Undo Move: Correct mistakes at any step
— Timer with pause functionality
— Auto-save: Progress is saved every 30 seconds
— Statistics: Number of puzzles solved, best time, current winning streak
— Resume Game: Continue an unfinished game after closing the app