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

This is a signature puzzle named 'Creighton'

The 9 elements in each group of this type of puzzle are: C, R, E, I, G, H, T, O, and N.

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

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

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

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

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

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

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