Sudoku is a Chinese puzzle. It is one of the most popular games in the world. It known as Number Place in USA.
In Sudoku there are no letters, just numbers. It is played with numbers but it does not require mathematical knowledge. There are some hint. You consider that clues and put numbers to the most matching squares.
Sudoku improves your brain. It is known in over 100 countries. You can play it in bus, in train etc. It is a wonderful game. You must play it and improve your brain.
In Sudoku, you must fill the 3x3 squares with using numbers from 1 to 9. You must use one time every number. And in every column and every line, you can use one time every number. It is Sudoku's simple rule.
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