App DescriptionaSudoku is really simple sudoku.
It is easy to learn but a challenge to master, puzzling players all over world.
Test your powers of observation and memory.
Fill it as fast as you can, challenge it！
***4 difficulty models;
***Error checking automatically;
***Share it with your friends.
Thank you for your support!
November 11, 2013 New version 1.4
September 26, 2013 New version 1.2
June 09, 2013 Initial Release