PlaySudoku.us
Easy · Puzzle #560
6
9
1
8
2
3
7
2
7
1
5
7
5
6
9
1
8
4
1
2
9
7
8
6
4
3
3
5
1
6
9
4
1
2
6
7
4
4
6
4
9
5
1
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.