Sudoku is a logic puzzle game with numbers for teens and adults. The goal is to fill every row, column of a 9x9 grid and 3x3 sub-grids with the numbers from 1-9 making sure there are no repeated digits in any row or column in the grid nor within the sub-grids.
By playing Sudoku more often, you can improve your memory, boost your concentration and ease depression.
Start your brain training today with Sudoku by SG.
Simple strategy game.
Five difficulty levels.
Plenty of Sudoku puzzles.
Landscape and portrait options.
Notes to track possible numbers.
Hints to assist when getting stuck.
Challenge your brain and become the Sudoku expert. Try it now!
The Basic Rules
A 9 x 9 grid is divided into 9 sub-grids (blocks) of 3 x 3.
1 - Each row can only contain numbers from 1 to 9.
2 - Each column can only contain numbers from 1 to 9.
3 - Each 3×3 block can only contain numbers from 1 to 9.
Sudoku tips for beginners
Searching for easiest opportunities first
Check a block, a row or a column that is almost full of numbers.
Finding empty squares that can only be one specific number (Unique Candidate)
Number 4 cannot be in the first row.
Number 7 should be in the third row.
Number 6 cannot be in the the first and second columns.
Finding sole candidate (One-Choice)
An empty square can only contain a single number because all other numbers are taken in current row, column, or box.
The highlighted square can only contain number 7 since numbers 1, 2, 3, 4, 5, 6, 8, 9 exist in current row, column, box.
The current row, column, box contain numbers 1, 2, 3, 5, 6, 7, 8, 9 except 4.