How to play

  • Select an empty cell and choose a number from 1 to 9 to fill it;
  • The objective is to fill all the cells following these three basic rules:
    • Don't repeat the numbers in the same row;
    • Don't repeat the numbers in the same column;
    • Don't repeat the numbers in the same subgrid (3x3 box);

For more instructions and explanations about strategies (ranging from basic to advanced), read our guide (written by a former Sudoku Grandmaster): How to Play and Strategies.

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