PlaySudoku.us
Easy · Puzzle #623
2
1
7
9
5
4
2
8
7
3
8
6
3
4
1
2
9
7
5
8
6
3
5
9
4
7
5
9
2
6
9
5
2
6
6
7
8
1
9
4
3
5
4
2
5
7
8
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.