Box

There are 9 3×3 boxes in each sudoku grid. Sometimes called a region.

Cell

One number is marked in each cell.

The numbers that are pre-marked on the sudoku puzzle to start the game.

The square of 9 cells across by 9 cells wide is called a grid. Sudoku is played on a grid.

Challenging version of sudoku that uses a 12×12 grid and the numbers 1 to 9 and the letters A, B and C.

Another name for the game of sudoku.

See Box.

Name for a number puzzle trademarked by a Japanese company. Means “single number” in Japanese.