The Daily Diagonal Sudoku
Play daily sudoku puzzles online for free. The difficulty level changes from day to day, and is indicated by the number of diamonds on the game calender. Score points and become the leader by the end of month, and replay any prevoius level. The diagonal sudoku has an additional challenge. The digits has to be different in all 3x3 boxes called houses, in all columns and rows, and also two largest diagonal lines. The online game has a bunch of useful options. For example you can print sudoku puzzles if you prefer classic pen and paper games. Also, you may want to highlight the errors automatically, as well as to check or solve a particular cell of the grid. Expand the menu on the right to adjust the settings and enjoy sudoku challenge daily online for free.