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

This is a signature puzzle named 'Cristabel'

The 9 elements in each group of this type of puzzle are: C, R, I, S, T, A, B, E, and L.

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

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

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

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

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

Each 3x3 square is a group numbered as shown in this Cristabel figure.

In a Cristabel puzzle, each 3x3 square is a group numbered as shown in the figure above.