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

This is a signature puzzle named 'Motherday'

The 9 elements in each group of this type of puzzle are: M, O, T, H, E, R, D, A, and Y.

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

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

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

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

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

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

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