Play Sudoku on Codebloc – Rules, tips, and global rankings

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Game rules
Sudoku is a 1-player game, here's how to play:
- Objective: Fill a 9x9 grid with digits so that each column, each row, and each of the nine 3x3 sub-grids contains all digits from 1 to 9.
- Game setup: The game is played on a 9x9 grid. Some cells are prefilled with digits.
- Gameplay:
- Select an empty cell, then choose a digit from 1 to 9.
- You cannot change cells that are not empty.
- A correct digit respects the Sudoku rules for row, column, and 3x3 sub-grid.
- Scoring: You earn points for each correct digit placed. Mistakes reduce your score.
- Game over: The game ends when you fill the entire grid correctly.
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