Sudoku+Free

数独+光滑整洁与数独游戏！

Sudoku+

Play Sudoku anytime and anywhere!

Enjoy simple and clean game interface!

- Fast Loading and Quick Exit (Auto Save)

- Various difficulty levels of Sudoku (easy, normal, hard, expert, and master)

- Simple keyboard and notes functions

- 4 different themes

- Unlimited hints

- Unlimited Cancels

- Compete with users around the world

- Totally Free!

Sudoku?

Originally called Number Place, Sudoku is a logic-based, combinatorial number-placement puzzle. The objective 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 (also called "boxes", "blocks", "regions", or "sub-squares") 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.

Completed puzzles are always a type of Latin square with an additional constraint on the contents of individual regions. For example, the same single integer may not appear twice in the same row, column or in any of the nine 3×3 subregions of the 9x9 playing board.

Although French newspapers featured variations of the puzzles in the 19th century, the modern sudoku only started to become mainstream in 1986 by the Japanese puzzle company Nikoli, under the name Sudoku, meaning single number. It only became officially recognized as being common in western media publications in 2005.