- This is a very popular board game. The objective of this game is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 sub-grids that compose the grid contains all of the digits from 1 to 9. The puzzle setter provides a partially completed grid, which for a well-posed puzzle has a unique solution.
- There are 2 levels in this game: Easy and Hard, with each level, players can play many games with different patterns, it makes this game more interesting
- Player can clear all conflicting cells which players put the number in wrong place