Sudoku Vault

Sudoku Vault keeps its puzzle focus clear: choose from 4x4, 6x6, or 9x9 boards, then take on one of four difficulty levels, Basic, Normal, Hard, or Expert. That structure gives the game a straightforward path from compact logic exercises to fuller classic sudoku grids, without adding distractions beyond the grid itself. The clean design and intuitive controls support that slower, deduction-first rhythm. The most practical tool is the smart NOTES feature, which helps track possible entries before committing to an answer. Progress checking is also explicit: tapping the CHECK button removes incorrect inputs and locks correct ones, giving players a way to correct course while staying focused on the solution. That assistance does not replace deduction; it simply makes mistakes easier to identify. A useful approach is to treat notes as a filtering tool rather than a place to fill every possibility immediately. Eliminating impossible candidates first keeps the board readable and makes each confirmed entry feel earned, especially on harder grids.