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Evil · Puzzle #689
3
5
4
7
3
1
7
9
6
5
3
4
2
4
9
8
7
4
8
7
3
5
8
6
6
9
3
After placing a digit, immediately check its row, column, and box for new naked singles.
After placing a digit, immediately check its row, column, and box for new naked singles.
"The greatest enemy of knowledge is not ignorance; it is the illusion of knowledge." — Stephen Hawking
"The greatest enemy of knowledge is not ignorance; it is the illusion of knowledge." — Stephen Hawking