Free printable hard sudoku how to#
Free printable hard sudoku download#
Free printable hard sudoku free#

Just click & print.Ĭhoose your level and print your sudoku, you can create you own sudoku book up to 12 pages.ġ2 pages of easy sudokus, print the grids.ġ2 pages of medium sudokus, print the grids.ġ2 pages of hard sudokus, print the grids.ġ2 pages of diabolic sudokus, print the grids. offers free printable Sudoku puzzles of different difficulty levels to suit any skill level. Of course 'Undo' and 'Redo' can be helpful too - the icons are just right of the board.Īnd be sure to open the Settings page (using the gear icon) and try various error highlighting modes - that's the indispensable tool for getting the hand in quickly finding the right provides free sudokus. Explore our collection of free printable Sudoku puzzles and solutions in various difficulty levels (easy, hard, evil), formats (2, 4 or 6 per page), and themes (kids, large). Just click the icon again to switch to placing big 'final' decisions (you can erase any of these too in case you change your mind). Just click the 'note' icon - now every number you put in a cell will be a small note alongside other candidates.

Just like in a paper Sudoku, you can make 'small pencil notes' in the cell of which numbers can go there. No matter what trick you use the most helpful thing for solving a Sudoku is 'penciling the candidates'. Now draw a horizontal and vertical line from every 4 on the board (you remember you can't place another 4 in a row or column) - it will quickly become clear there are almost no cells left where you can actually put it.

Free printable hard sudoku download#

Click on the links below to download PDFs which are set to print on A4 paper. Choose a number that occurs most on the board already (so there's one or two instances left to place) - there are indicators below the board to help you find the best one. FREE PRINTABLE SUPER FIENDISH SUDOKU - Richardson Puzzles and Games. The more advanced technique you can use for a harder puzzle called 'scanning': it exploits the fact that any given number from 1 to 9 can occur only nine times in a completed Sudoku puzzle. Now you will notice the more and more rows, columns and regions become almost complete and easy to deduce - the complete puzzle picture becomes clearer with each move. Now try to use the same technique but now with an almost filled-in row or column - find the one where only one number missing (then the answer is obvious) or two ones missing - try both options and figure out the right one. Which one is correct? Just place 3 and look across the whole row, then the column: is there a duplicate? Try the same with 7 and you'll get the correct option.

Free printable hard sudoku how to#

For example, if a 3x3 square lacks just the numbers 3 and 7, we have only two options on how to place these two remaining numbers - 3 in a first cell and 7 in a second one or vice versa. You will certainly see a square where just one or two numbers are missing. Start a Sudoku puzzle on an Easy level to learn all the techniques quickly.

Sounds like a tricky task? Just start scanning the board and you'll find all clues you need, one by one, and get the puzzle solved. So each number from 1 to 9 occurs only one time in each row, column and region. Now you just need to fill the remaining cells with numbers from 1 to 9, obeying the only rule:Įach row, column or region must not contain repetitive numbers. The more cells are pre-filled the easier the puzzle. You start a Sudoku puzzle with some cells already filled in with numbers. So each row, column or region contains nine cells. In each Sudoku puzzle you have a 9x9 grid, divided into nine 3x3 square regions (you can just look above to get an impression). DONATE FEEDBACK More Games Puzzles Solitaire Mahjong How to Play Sudoku