Documentation · positions-81-72-9
81 · 72 · 9
The structure distinguishes 81 theoretical positions, 72 accessible and 9 inaccessible.
Spatium contains 81 theoretical positions. 72 are accessible; 9 are not.
The identifiers and canonical map of the nine inaccessible positions are not defined in version 1.0.0. Visualizations that place them in a grid or circle are therefore models.
81=9×9; 72=8×9; 81−72=9. The identities are formal; the topology used to represent them graphically is qualified separately.