PlaySudoku.us
Medium · Puzzle #594
1
2
9
5
7
8
9
4
7
4
3
8
6
9
8
1
7
9
2
6
4
1
8
1
2
5
9
7
6
1
7
9
3
4
9
7
Complete an Evil puzzle from start to finish in a single uninterrupted session. No breaks, no distractions.
Complete an Evil puzzle from start to finish in a single uninterrupted session. No breaks, no distractions.
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.