Guardian Sudoku puzzle requires players to fill grid with numbers one through nine
The Guardian published a difficult Sudoku puzzle on Friday for readers to solve in the next issue.
Puzzle rules and layout
Players must place digits so each row contains every number from one to nine. Every column and each 3×3 box must also hold all nine numbers without repetition. The grid is designed to be solved using standard logic techniques.
Solution availability details
Readers can find the completed puzzle by purchasing the following Monday through Thursday edition. Solutions for puzzles released on Friday and Saturday appear in either Saturday or Monday editions. Buying the next issue reveals the answer to the current hard challenge.
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