Logic & Constraint Elimination
Every clue removes possibilities; a solution is justified only when all constraints hold and competing possibilities are eliminated.
What you'll learn
- Maintain a complete set of candidates while applying clues one at a time.
- Combine clues rather than treating each clue as a separate puzzle.
- Distinguish a statement from its unsupported converse.
- Verify that the final candidate satisfies every clue and is unique.
Before you start
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