Sudoku Rules and Techniques
Sudoku Rules
Acknowledgments
I would like to acknowledge these sites referenced for strategy ideas and solving techniques.
SudokuWiki.Org by Andrew Stuart
Sudoku Rules
Cross Hatching
Counting
Naked Set
Hidden Set
Claiming
Remote Pairs
X Wing
XY Wing
Simple Coloring
Fishy Things
Unique Rectangle
X Chain
Aligned Pair Exclusion
Forcing Chains
Finned Fishy Things
Almost Locked Sets
Counting
Naked Set
Hidden Set
Claiming
Remote Pairs
X Wing
XY Wing
Simple Coloring
Fishy Things
Unique Rectangle
X Chain
Aligned Pair Exclusion
Forcing Chains
Finned Fishy Things
Almost Locked Sets
Acknowledgments
I would like to acknowledge these sites referenced for strategy ideas and solving techniques.
SudokuWiki.Org by Andrew Stuart
Buddy Cells
A Buddy Cell is any cell that is in the same units (row, column or box) as the cell you are working on. The content of a cell will influence all it's Buddy Cells.Each cell in a 9 x 9 Sudoku puzzle has 20 buddy cells.
In Figure 1 all the Buddy Cells of the red cell in row 4 column 8 are yellow.
Any cell cannot have a value in it that is already placed in any of it's buddy cells.
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