Sudoku Glossary

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1. block

A block, box, region or subgrid is a rectangular section of the Sudoku where each number must appear once. In the typical 9 x 9 Sudoku, there are 9 regions, each 3 x 3. Sometimes the Sudoku will have alternate regions shaded so that they are easier to see.

2. box

A block, box, region or subgrid is a rectangular section of the Sudoku where each number must appear once. In the typical 9 x 9 Sudoku, there are 9 regions, each 3 x 3. Sometimes the Sudoku will have alternate regions shaded so that they are easier to see.

3. candidates

The candidates, contingencies or possibilities are the numbers that are possible solutions for a given cell. As you continue to solve the Sudoku, each cell will eventually have only one possibility which is the solution for that cell.

4. cell

A cell is the smallest square in a Sudoku puzzle. Some people call the cells squares, but this can be confusing. After all, the whole puzzle is a square, and so are the regions inside the puzzle. There are 81 cells in the typical 9 x 9 Sudoku grid

5. clue

The numbers already present before the puzzle is started are called clues or givens.

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