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Evil · Puzzle #843
4
8
9
7
3
5
5
3
5
6
7
2
4
8
2
5
1
6
8
9
4
1
9
4
Sudoku has no math — you could replace the digits 1–9 with any 9 symbols and the puzzle works identically.
Sudoku has no math — you could replace the digits 1–9 with any 9 symbols and the puzzle works identically.
SAT solvers — used in chip design verification — can crack any Sudoku puzzle in milliseconds.
SAT solvers — used in chip design verification — can crack any Sudoku puzzle in milliseconds.