Guardian Sudoku puzzle requires buyers to purchase next issue for solutions
Readers must buy the following edition of the Guardian newspaper to see the completed solution for the medium difficulty Sudoku published Monday through Thursday.

Puzzle rules and grid layout
Participants fill a nine by nine grid with numbers ranging from one to nine. Every row, every column and each 3×3 box must contain these specific digits exactly once. The puzzle is rated as medium difficulty for the weekly challenge.
Accessing the full solution
The completed grid is not printed in the current edition containing the unsolved puzzle. Solutions for Friday and Saturday puzzles appear in either Saturday or Monday editions instead. Buying the next issue reveals the answer to the current medium difficulty task.
Weekly publication schedule details
Puzzles are published daily from Monday until Thursday within the newspaper run. The final answers for these specific days are reserved for later printings. This distribution method applies consistently to the standard weekly puzzle series.
Reported by one outlet
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