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If two numbers in horizontally or vertically adjacent cells are consecutive numbers (ie 1 and 2 or 5 and 6), then a gray bar marks the boundary of those cells. Here are examples for each type (even though the same rule applies for both).Ĭonsecutive/Nonconsecutive Sudoku: Fill in each cell with a digit from 1 to 9 so that no digit is repeated in any row, column, or 3x3 box. You can try this on Penpa+, SudokuLab or. Digits along an arrow must sum to the digit in its circle. Standard non-consecutive rules apply Orthogonally adjacent cells cannot contain consecutive digits. I never saw too many with fun patterns, so Wei-Hwa and I experimented with this in Mutant Sudoku. For instance, a normal 9x9 sudoku puzzle but with the non-consecutive constraint can be valid with around just nine givens, as intimidating as this may look to. Each row, column and 3x3 box contains the digits 1 to 9. While it reuses a pattern I made earlier this year, the example (of comparable difficulty) being in the shape of "Sudoku Cup 3" made sense:Ĭlassic Sudoku: Fill in each cell with a digit from 1 to 9 so that no digit is repeated in any row, column, or 3x3 box.Ī couple years ago, before I fell in love with Arrow Sudoku, my favorite variants were Consecutive and Nonconsecutive Sudoku. Classic Killer Sandwich Palindrome Thermo Non-consecutive Diagonal Arrow Kropki XV Reflection Jigsaw (Irregular) Chess King & Chess Knight. What you can’t have, for example, is a 1 diagonally next to a 2 because the 1 & 2 are. But as you can see from the givens, consecutive numbers can be adjacent horizontally or vertically. 3) After solving one row, move on to solve another row. For instance if the middle cell of a row contains a 4, then the four adjacent.

If there is more than one empty cell, there is more than one way to solve it. And that rule change is that adjacent cells cannot contain consecutive numbers. 2) Place one of your numbers in one of these empty cells.

No digit may be diagonally-adjacent to a consecutive digit. 1) Find all empty cells for this particular row and column. A sudoku competition should have some good classic sudoku. Sudoku Non-consecutive-diagonal 9×9 1 puzzle This is a non-consecutive-diagonal sudoku puzzle.