5. GLOSSARY OF TERMS

Box: group of cells in a right-angled form in which all cells must contain different symbols.

Cell: a cell where we must place the symbols.

Column: a group of placed cells in a vertical form in which all cells must contain different symbols.

Group: a number of cells in which no cell should contain two identical symbols. They may be rows, columns or boxes.

Row: a group of placed cells in a horizontal form in which all cells must contain different symbols.

Grid: a number of groups and cells in a right-angled form inside which all possible columns and rows (except boxes) may be created. Several grids may have a common grid. Each sudoku must possess one grid (at the minimum).

Samurai: sudoku type with a board that has five grids, in which the central grid possesses common boxes with other four boxes which are situated in the angles.

Symbols: these are signs with which we fill each cell. In the present program symbols from1 to 9 are used. In case if we need more than nine symbols, we can use letters of the alphabet from a to z.

Sudoku: pleasant pastime the aim of which is to fill with symbols cells that are divided into grids each containing a certain number of rows, columns and boxes. Besides, each of these groups possesses a certain number of cells in which a certain number of symbols must be placed. To solve sudoku several symbols are suggested as the initial data, providing that there exists only one possible solution.

Board: a number of grids that form an independent structure. Several sudokus may possess one and the same board having different symbols.