PlaySudoku.us
Easy · Puzzle #209
3
2
1
9
6
1
2
6
7
9
4
6
7
3
5
8
5
2
3
1
8
2
1
6
5
3
3
6
8
5
7
2
4
8
7
2
3
5
4
6
2
1
4
7
8
5
4
3
6
2
7
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.
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.