The playing mat for the game of On-Sets consists of five sections.

1. Resources: the cubes are placed here after they have been rolled by the Goal-setter.
2. Goal: the Goal-setter places the Goal on this section.
3. Required: cubes played here must be used in any Solution.
4. Permitted: cubes played here may be used in any Solution.
5. Forbidden: cubes played here may not be used in any Solution.

On-Sets page.