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

This is a signature puzzle named 'Ichabod'

The 7 elements in each group of this type of puzzle are: I, C, H, A, B, O, and D.

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

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

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

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

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

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

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