Sudoku Flow - Increase Focus

Sudoku Flow provides loads of fun 9x9 Sudoku puzzles! Improve your focus and your working memory while challenging yourself with this number placing puzzle.
HOW TO PLAY
Fill the 9×9 grid with digits so that each row, column, and the nine 3×3 subgrids that compose the grid contain all of the digits from 1 to 9.
CHANGE DIFFICULTY
Choose different difficulty levels to find the right level of challenge for you.
TONS OF PUZZLES
With over 1000 puzzles, this simple, classic Sudoku game will challenge your concentration and provide endless fun.
SUDOKU FACTS
Did you know that modern Sudoku was developed in the U.S.A.? As far back as the late 19th century, there were different versions of Sudoku in Europe that allegedly led Indiana’s Howard Garns in 1979 to develop what was then called “Number Place”. In 1984, it was introduced in Japan where it is still generically known as Nambapuresu. Sudoku was the name used by the original newspaper that published the game in Japan.