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Puzzle Copyright © Kevin Stone
Objective / Rules
- Complete the grid so that every row and column contains every number exactly once.
- Rule 1 – if there is a symbol, the numbers are neighbours.
- Rule 2 – if there is NOT a symbol, the numbers are NOT neighbours.
- The symbols indicate which squares are numeric neighbours that differ by 1 (e.g. 1
2, 34, 21).