Learning Sudoku Solving Techniques by Examples The other option is to bring up our smart Sudoku solver to solve your puzzle step by step with explanations. One option is to give the solution of your puzzle instantly. Our online Sudoku solver offers two options to solve your Sudoku puzzles. Want to play on our interface to solve a Sudoku puzzle you found from somewhere else? Just enter your puzzle on our online Sudoku blank grid, and you can utilize all our interface features to solve your Sudoku puzzle. Play Your Own Sudoku Puzzles with Our Interface So you can exercise your brain in a daily basis. Our Daily Sudoku page offers a new Sudoku puzzle for each difficulty level every day. You can use our interface to enter candidates in a cell, highlight a cell that you want to make a note, trace and retrace steps with undo/redo buttons, fill in candidates for all empty cells with one key, save an unfinished puzzle in the middle of the game, check mistakes or violations for your entries, and more (see the manual of our interface for all features). But our interface makes it more convenient for you to apply the logic and trace the steps. You still need to solve the puzzles with your own. The interface here has many features that can help you to solve the puzzles. Also the expert area provides extremely difficult Sudoku puzzles for those who are familiar with the most advanced Sudoku solving techniques. The chance that you play the same Sudoku puzzle is almost zero. Play Sudoku Onlineīillions of free Sudoku puzzles of varying difficulty levels are offered here online. The objective is to fill the 9x9 Sudoku grid with digits from 1 to 9 such that each of these 9 digits appears in each row, each column and each 3x3 block once and only once. To print multiple puzzles, there are special pages to print two, four, or six puzzles per page.Sudoku is a logic puzzle game. Guessing is never required - but it may help! Each puzzle has a unique solution and can be solved with pure logic. The position is saved as 81 digits at the end of the URL string, with hyphens used for empty cells.Įxtreme Sudoku posts five new puzzles every day. To save any position, right-click on under the grid, and click Add To Favorites or Bookmark This Link. You can add symbols too, such as question marks. If you prefer to enter your own pencilmarks, up to six digits can be entered in each cell. These update by themselves as you solve particular cells and cannot be edited manually. There are automatic pencilmarks that appear if you check the Pencilmarks box. So it's possible to have incorrect digits that don't conflict, but eventually you will get stuck. The Show Conflicts button does not apply the solving logic - just checks whether there are any conflicting digits already in the grid.
To print the puzzles use either the Print button below the grid, or if you want to print the pencilmarks as well, use the browser Print option under the File menu. See our guide to solution rules for hard sudoku puzzles.Īll the puzzles on this site rate a "fiendish" category, but then we picked the hardest, and graded them in five progressively more difficult categories: Evil, Excessive, Egregious, Excruciating, and Extreme, in order from least difficult to most difficult. Difficulty depends on the type of steps required to solve them, and also on the number of each type of step. Solving these puzzles is a different matter entirely, since these are the most difficult puzzles we create.
Each row, column, and 3 x 3 box must contain only one of each of the 9 digits. Just place the digits from 1 to 9 in each empty cell.
Then try some of our very hard sudoku puzzles.