PlaySudoku.us
Evil · Puzzle #578
4
1
2
6
9
8
1
2
3
9
8
4
1
6
8
7
5
6
2
5
4
1
8
7
2
5
Techniques used
- Hidden Single
- Naked Quad
- Naked Single
- Naked Pair
- Pointing Pair
- Box-Line Reduction
- 2-String Kite
- X-Wing
- XY-Chain
- Forcing Chains
"I hated every minute of training, but I said: don't quit. Suffer now and live the rest of your life as a champion." — Muhammad Ali
"I hated every minute of training, but I said: don't quit. Suffer now and live the rest of your life as a champion." — Muhammad Ali
Simulated annealing — a probabilistic optimization method — can solve Sudoku but cannot guarantee a unique solution.
Simulated annealing — a probabilistic optimization method — can solve Sudoku but cannot guarantee a unique solution.