![]() The work around until this is sorted would be as 1to9only kindly suggested. This will appear more commonly in variants with windoku and will not appear in vanilla. From preliminary analysis it appears that the bug may involve any grouped strong link in a box or disjoint group where the cells of the grouped strong link include what I term "heart cell" which is the intersection cell of the mini column and mini row in a box or disjoint group. This bug has been logged to look into soon. It removes candidate 4 from r1c6, when it is the cell solution. I've looked at SukakuExplainer' solution path, and it goes wrong at step 64:Ĭode: Select all 4.3, Grouped 2 Strong links 101: Cell r9c7,r7c9,r7c5,r1c5 on value 4: r1c64 ED=9.0/6.6/2.6ġto9only wrote:SudokuMonster's SukakuExplainer (private build, version 1.17.11) solves this X-Windoku incorrectly, and chokes up.Ĭode: Select all. To print multiple puzzles, there are special pages to print two, four, or six puzzles per page.A few x-sudokus generated with the pattern from the last pattern game:Ĭode: Select all. ![]() 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.
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