** Detailed instructions for working a group puzzle of type 'Sudoku-7B' **

The 7 elements in each group of this type of puzzle are: **1**, **2**, **3**, **4**, **5**, **6**, and **7**.

Every group in the puzzle must contain *exactly* this set of elements.

In a Sudoku-7B puzzle, each row is a group numbered as shown in the figure above.

In a Sudoku-7B puzzle, each column is a group numbered as shown in the figure above.

In a Sudoku-7B puzzle, each septomino is a group numbered as shown in the figure above.