Sudoku Rules and Terminology

The Basic Rule of Sudoku

To complete a Sudoku, you need to fill in the empty cells so that each row, each column and each box must contain all the digits between 1 and 9, and each digit can appear only once.

But don't worry, we will talk about that in more detail later.

First, let's learn a few Sudoku terms.

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Start a Random Sudoku

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Hard   Evil

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