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Expert · Puzzle #791
7
1
8
2
6
4
6
6
3
5
7
6
8
2
8
7
8
1
3
1
3
5
4
2
"One cannot escape the feeling that these mathematical formulas have an independent existence and an intelligence of their own." — Heinrich Hertz
"One cannot escape the feeling that these mathematical formulas have an independent existence and an intelligence of their own." — Heinrich Hertz
The pigeonhole principle explains why 8 clues are never enough to guarantee a unique Sudoku solution.
The pigeonhole principle explains why 8 clues are never enough to guarantee a unique Sudoku solution.