Detailed instructions for working a group puzzle of type 'Sudoku-7B-X'
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-X puzzle, each row is a group numbered as shown in the figure above.
In a Sudoku-7B-X puzzle, each column is a group numbered as shown in the figure above.
In a Sudoku-7B-X puzzle, each septomino is a group numbered as shown in the figure above.
In a Sudoku-7B-X puzzle, each diagonal is a group numbered as shown in the figure above.