Sudoku Sudoku hard. Fill the grid so that every Sudoku Sudoku hard. Fill the grid so that every Sudoku Sudoku hard. Fill the grid so that. How to Play. Fill the grid with your keyboard so that every row, column and 3×3 box contains the digits 1 to 9, without repeating. Navigate the grid with the arrow. Extreme Sudoku - Very Difficult Sudoku Puzzles and Solver. Two Sudoku Puzzles Printed · Four Sudoku Puzzles Printed · Sudoku Printables. Please upgrade your browser. Valentines Day Sudoku St. Call for customer service charged at standard rate. Web hosting by AfterImage Internet Marketing. The Guardian back to top. International edition switch to the UK edition switch to the US edition switch to the Australia edition. Hard Sudoku is named as such because answers will not always be easily evident at this level of sudoku play. Summer Sudoku is heating up with Hard Sudoku, and this game is surely only for seasoned Summer Sudoku players who love a good challenge. Thursday 22 June Fill the grid so that every row, every column and every 3x3 box contains the numbers 1 to 9. You can add symbols too, such as question marks. Play an interactive sudokuor try one of our printable online spiele ohne download kostenlos sudokus. Sudoku Puzzle Archive All the puzzles on this site rate a "fiendish" category, but then we picked the hardest, and graded them in five progressively more difficult categories: Disabling this mode will clear all the candidates, so this can be toggled on and off for a quick at-a-glance candidate survey. So it's possible to have incorrect digits that don't conflict, but eventually you will get stuck. Evil Excessive Egregious Excruciating Extreme. Use Fill Mode the big 1 button to enter numbers you are confident .