PlaySudoku.us
Easy · Puzzle #47
8
1
2
7
7
1
5
8
9
5
6
8
4
9
6
3
1
7
2
7
1
6
3
8
5
9
3
6
2
9
4
1
9
5
6
7
3
8
4
8
7
1
5
9
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.