Try Sudoku 4 in 1, if you are passionate about Suduku and want more challenging challenges. It immediately begins to flood the board with numbers as clues. The most prefilled numbers are on the wooden board in Easy mode. In higher difficulty settings, fewer digits are filled in automatically. Enjoy!
How to play
In Sudoku 4 in 1, the standard 9x9 grid is broken down into nine 3x3 sub-grids. Each of the 81 cells in the grid must contain a number between 1 and 9, and each number can only occur once in each of the three levels of the grid (row, column, and sub-grid). If a line is missing exactly one tile, use it to complete the line. Following that, complete the lines that are missing exactly two tiles. If you want to avoid overlap, you should always check both rows and columns. In both the main grid and any subgrids, the numbers must never repeat. Playable by anyone, the game has four tiers of difficulty (Easy, Medium, Hard and Expert).