Detailed instructions for working a group puzzle of type 'Beatrix'

This is a signature puzzle named 'Beatrix'

The 7 elements in each group of this type of puzzle are: B, E, A, T, R, I, and X.

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

Each row is a group numbered as shown in this Beatrix figure.

In a Beatrix puzzle, each row is a group numbered as shown in the figure above.

Each column is a group numbered as shown in this Beatrix figure.

In a Beatrix puzzle, each column is a group numbered as shown in the figure above.

Each septomino is a group numbered as shown in this Beatrix figure.

In a Beatrix puzzle, each septomino is a group numbered as shown in the figure above.