The object of the game is to fill the grid with a series of numbers all different, which are never more than once on the same line, in the same column or in the same region. The symbols are numbers ranging from 1 to 9, the regions then being 3 × 3 squares. A few symbols are already arranged in the grid, which allows a progressive resolution of the complete problem.
This app allow 4 difficulties: Easy mode, Medium mode, Hard mode and Expert mode.
You can you hints to help you when you're block on a level. You can buy hints if never you don't have hints anymore.
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