PlaySudoku.us
Evil · Puzzle #48
1
1
2
4
8
6
9
5
7
6
3
8
7
4
8
1
2
1
9
2
2
8
7
6
4
3
6
Techniques used
- Hidden Single
- Naked Pair
- Naked Triple
- Pointing Pair
- X-Wing
- Skyscraper
- W-Wing
- UR Type 4
- Forcing Chains
- Naked Single
- XY-Chain
Graph coloring and Sudoku are equivalent problems. Each cell is a node; edges connect cells that share a house. Solving Sudoku = coloring the graph with 9 colors.
Graph coloring and Sudoku are equivalent problems. Each cell is a node; edges connect cells that share a house. Solving Sudoku = coloring the graph with 9 colors.
"Plato is dear to me, but dearer still is truth." — Aristotle
"Plato is dear to me, but dearer still is truth." — Aristotle