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

This is a signature puzzle named 'Cordelia'

The 8 elements in each group of this type of puzzle are: C, O, R, D, E, L, I, and A.

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

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

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

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

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

Each 4x2 rectangle is a group numbered as shown in this Cordelia figure.

In a Cordelia puzzle, each 4x2 rectangle is a group numbered as shown in the figure above.