
To print multiple puzzles, there are special pages to print two, four, or six puzzles per page. 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 also use this solver to help you create and check your own 9x9 and 16x16 sudoku puzzles. helps you solve and play all the 9x9 and 16x16 sudoku puzzles that you set yourself, as well as many pre-set puzzles on the site. You can add symbols too, such as question marks. Sudoku, hexadoku, chaos sudoku solver online. If you prefer to enter your own pencilmarks, up to six digits can be entered in each cell.
16x16 sudoku with diagonal update#
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. To differentiate these puzzles from the normal variety, dashed lines on the puzzle. Not only do you have to put the digits from 1 to 9 in each cell of each row, column, and 3×3 square, but you also do that for the two diagonals. So it's possible to have incorrect digits that don't conflict, but eventually you will get stuck. Diagonal Sudoku puzzles are like regular Sudoku puzzles but with two extra groups. 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. Play Sudoku, Wordoku, Sudoku X, Jigsaw Sudoku, Killer Sudoku, and Sudokus with only 17 givens.
16x16 sudoku with diagonal series#
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. Latest books in the Anti Diagonal Sudoku series 1 - Anti Diagonal Sudoku 9x9 - Easy to Extreme 2 - Anti Diagonal Sudoku 16x16 - Easy to Extreme At.

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.
