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Evil · Puzzle #463
6
5
7
3
9
2
4
2
9
3
4
9
6
9
1
2
1
8
7
5
1
6
4
3
"To know what you know and what you do not know — that is true knowledge." — Confucius
"To know what you know and what you do not know — that is true knowledge." — Confucius
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.