Play Sudoku Vault Online Free

About This Game

Sudoku Vault packs four board sizes — 4x4, 6x6 and 9x9 — into one clean logic game, with four difficulty levels stacked on top: Basic, Normal, Hard and Expert. That combination makes it the rare sudoku that genuinely serves every member of a household: a child can learn deduction on a 4x4 in two minutes, while an expert grinds 9x9s that demand real notation work. Each grid generates a fresh challenge, so the vault never empties. The interface stays out of the way and the difficulty dial is always one tap from view. Free sudoku, scaled to whoever picks up the phone.

How to Play

Fill the grid so no digit repeats in any row, column or marked box — smaller boards use subsets of the digits (1-4 on 4x4, 1-6 on 6x6, 1-9 on 9x9). Pick your board size and difficulty from the vault menu before you start. Tap cells and place numbers; the same logic applies at every scale: crowded units yield the surest placements. Tip: when moving up a board size, start one difficulty level lower than usual — extra columns change the feel more than you expect.