PlaySudoku.us
Easy · Puzzle #407
5
3
1
9
4
2
1
2
4
6
8
3
3
9
7
2
9
1
8
7
6
4
3
6
5
1
4
7
1
9
6
5
9
3
4
8
8
4
2
7
4
6
2
3
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.