PlaySudoku.us
Easy · Puzzle #128
2
9
5
7
8
1
5
6
5
7
4
6
3
1
2
6
7
8
5
1
4
7
2
6
4
9
3
8
5
9
2
7
6
4
3
6
7
2
7
2
1
9
4
8
9
4
2
3
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.