Mirrored from Sudopedia, the Free Sudoku Reference Guide
Reverse BUG Lite
The Reverse BUG Lite is a generalization of the Reverse BUG solving technique. It can be stated as follows:
- In solving a sudoku with a unique solution, it is not possible to have two rows or columns partially filled so that all filled digits together form an unavoidable set.
The reason is because the unfilled cells in these two rows or columns also form an unavoidable set.
If rows 1 and 2 look like this:
1 . . | 2 . . | 3 . .
3 . . | 1 . . | . . .
Then R2C7 <> 2.
This page was last modified 22:49, 26 August 2009.