Detailed instructions for working a group puzzle of type 'Gilbert'
This is a signature puzzle named 'Gilbert'
The 7 elements in each group of this type of puzzle are: G, I, L, B, E, R, and T.
Every group in the puzzle must contain exactly this set of elements.
In a Gilbert puzzle, each row is a group numbered as shown in the figure above.
In a Gilbert puzzle, each column is a group numbered as shown in the figure above.
In a Gilbert puzzle, each septomino is a group numbered as shown in the figure above.