PlaySudoku.us
Easy · Puzzle #425
1
8
7
9
8
4
5
1
3
5
6
1
7
9
4
1
7
4
2
4
1
6
5
7
8
3
9
4
6
1
2
4
3
6
8
7
5
9
1
7
3
4
6
2
5
3
9
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.