Sudoku-DG
From Sudopedia, the Free Sudoku Reference Guide
Jump to navigationJump to searchSudoku-DG (also known as Offset Sudoku) is a Sudoku Variant with additional constraints. DG refers to the 9 disjoint groups in the puzzle, one for each relative box position.
Here is an example:
The 9 disjoint groups each have a distinct color. Each group of 9 cells with the same color must also contain digits 1 through 9.
The additional groups can be used in the following standard solving techniques:
- Hidden Single
- Locked Candidates
- Naked Subset
- Hidden Subset
- Coloring
- Chains and Loops
- Almost Locked Set
The extra groups will also allow you to search for additional fish patterns. However, no research has been done yet into possible fish patterns for Sudoku-DG.
Minimum Number of Givens
It is possible to have a valid Sudoku-DG with only 12 givens, however it is unknown whether this is the minimum number. Examples of such puzzles can be found in this forum post.
