PlaySudoku.us
Easy · Puzzle #641
2
5
6
7
4
9
7
4
9
2
4
9
5
2
8
1
7
6
9
7
6
3
4
6
2
1
8
5
1
8
2
9
9
2
5
8
1
3
3
8
7
9
6
2
6
1
4
3
9
7
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.