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Evil · Puzzle #712
4
1
2
7
6
9
8
3
7
9
8
3
1
3
9
2
2
5
6
8
5
7
9
8
Techniques used
- Naked Single
- Hidden Single
- Naked Pair
- Naked Quad
- Pointing Pair
- Forcing Chains
- Skyscraper
- Box-Line Reduction
- XY-Chain
- X-Wing
In competitive Sudoku, top solvers can complete an expert-level puzzle in under 3 minutes.
In competitive Sudoku, top solvers can complete an expert-level puzzle in under 3 minutes.
"The first principle is that you must not fool yourself — and you are the easiest person to fool." — Richard Feynman
"The first principle is that you must not fool yourself — and you are the easiest person to fool." — Richard Feynman