About Sudoku Vault

Sudoku Vault gives you classic number-placement puzzles in three grid sizes: 4×4, 6×6, and the traditional 9×9. You pick a difficulty (Basic, Normal, Hard, or Expert) and start filling empty cells so that every row, column, and box contains each digit exactly once. The smaller grids are perfect when you want a quick solve, while the 9×9 Expert boards will test even seasoned players. A pencil-mark system lets you jot down candidate numbers in any cell, which is essential for tracking possibilities as the puzzle tightens. When you're unsure, the Check feature highlights mistakes and confirms correct entries, so you can course-correct without starting over. Whether you're learning the ropes or hunting for a daily mental workout, Sudoku Vault delivers straightforward logic challenges that feel satisfying to crack. Fans of number puzzles on Poki Games will appreciate the clean interface and range of difficulties that keep each session fresh.

How to play Sudoku Vault

Mouse or tap – select a cell
Mouse or tap number pad – fill in a digit
Note button – toggle pencil marks for tracking candidates
Check button – validate entries (removes incorrect numbers, locks correct ones)