![]() ![]() MaxAscending Sudoku: The length of the longest series of ascending digits in the corresponding direction. Higher skyscrapers block the view of lower ones, size being given by the digit. Skyscraper Sudoku: The number of visible skyscrapers from that side. Next-to-6 Sum Sudoku: The sum of all direct neighbours of the digit 6 in the row or column. Outside-2 Sudoku: Must be placed in one of the first two cells in the corresponding direction. Outside clues per variant show:ĭifference Sudoku: The difference of the first two digits in the corresponding direction. Normal 6圆 sudoku rules apply to all sudokus, so each row, column and region must contain 1-6. A circle is an outside clue for both adjacent puzzles. This is one large puzzle, consisting of six different variants of 6圆 sudokus, all linked together by circles. ![]() May not work on non sudoku grids or special constraints. Use your usual Sudoku strategies together with the ones you developed for the Jigsaw variation.Hotkeys Selection Select cells + Mouse click/drag Add or remove from current selection Move selection +, + Add to current selection + Select all cells + + Deselect all cells + Invert selection, Tool sensitive selection Number Entry Insert value, pencil mark, candidate or colour Insert value, pencil mark, candidate or colour Button Insert value, pencil mark, candidate or colour Change Tool, Next mode +, Previous mode "Digit" mode ( on German keyboard layout) "Corner" mode "Centre" mode "Colour" mode + Enter digit in "centre" mode + Enter digit in "corner" mode + + Enter digit in "colour" mode Undo / Redo + Undo last action + Redo last action if it was undo Check finished puzzle Button Press the check button to test basic sudoku rules. Tip: The are nine extra Sudoku regions in this example, which gives you a lot of information to work with even if not many initial clues are given. This example of Jigsaw Plus has difficulty level 2 out of 3. This is an original Brainfreeze variation. The numbers 1-9 must each appear exactly once in each row, column, block, and jigsaw region. In this variation we keep the usual Sudoku blocks and add jigsaw regions. In the Jigsaw variation above, we took away the usual Sudoku blocks and replaced them with jigsaw regions. We can tell immediately that the two green cells in the hook contain the same numbers as the two purple cells at the end of the last row of the puzzle. In this particular example, the lower left green snake is such a region. Tip: Look for long snake regions that hook around at the end. This example of Snakes has difficulty level 1 out of 3. ![]() The numbers 1-9 must each appear exactly once in each row, column, and snake. This is a simple modification of the Jigsaw variation above, where the jigsaw regions are long and skinny like snakes. To "scan" under these new rules, try choosing one jigsaw region at a time and finding numbers to place in that jigsaw given the row and column restrictions. This means that the usual Sudoku strategies won't apply here, at least without some modification. ![]() Tip: This variation doesn't just add conditions to the usual Sudoku rules, it actually changes the rules by changing the shapes of the block regions. This example of Jigsaw has difficulty level 2 out of 3. This sort of "easter egg" is common in puzzles that are made by hand, and rarely seen in mass-computer-generated puzzles. In this particular example, notice how some patterns of clues mimic a pattern in the jigsaw design. The numbers 1-9 must each appear in every row, column, and jigsaw region. This variation is commonly called "Jigsaw Sudoku", because the usual Sudoku blocks have been replaced with regions that resemble pieces of a jigsaw puzzle. ![]()
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