PlaySudoku.us
Easy · Puzzle #722
9
1
5
4
7
8
9
3
9
2
4
1
8
7
2
5
3
4
1
4
6
3
5
9
7
2
7
8
4
3
5
3
2
4
8
1
7
9
8
4
2
7
6
3
5
3
8
2
4
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.