PlaySudoku.us
Easy · Puzzle #542
8
4
5
7
5
9
7
6
3
8
4
7
6
2
1
4
8
3
6
7
2
3
6
4
8
5
7
3
1
5
8
7
6
1
3
2
9
8
4
5
8
6
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.