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Sudoku Vault is a captivating logic puzzle game offering hours of brain-teasing fun! Challenge yourself with Sudoku grids of various sizes – 4x4, 6x6, and the classic 9x9 – and four difficulty levels: Basic, Normal, Hard, and Expert. Perfect for both beginners and seasoned Sudoku enthusiasts, each puzzle provides a fresh and stimulating mental workout. Strategize with smart notes to track potential solutions. Our built-in check function instantly validates your entries, removing incorrect numbers and locking in correct ones for effortless progress tracking. Sharpen your mind, improve your logical thinking, and enjoy the addictive satisfaction of solving each unique Sudoku puzzle. It's a fantastic way to exercise your cognitive abilities and stay entertained – kids friendly and free from any themes that are not appropriate. Dive into the world of numbers and discover the thrill of becoming a Sudoku master! A great challenge for anyone who loves puzzles. Features: 4x4, 6x6, and 9x9 Sudoku grids; Four difficulty levels (Basic, Normal, Hard, Expert); Smart notes for tracking possibilities; Instant check function to validate entries; A stimulating and engaging experience for all ages. Develop your critical thinking and enjoy a fun, rewarding challenge! Sudoku, Sudoku game, logic puzzle, 4x4 Sudoku, 6x6 Sudoku, 9x9 Sudoku, puzzle game, brain game, mental exercise, challenging, beginner Sudoku, expert Sudoku, kids Sudoku, cognitive skills, thinking, logic, number puzzles, free puzzle game