Valid assembly contact Fits
A depth-7 tab follows the same boundary as the depth-7 pocket.
Geometry study / frozen candidate 01
One seven-cube chair, modified by 192 curved tabs and pockets.
Inspect the solid, assemble identical copies, and see why one periodic arrangement fails.
A slice through a pocket and its opposing tab, at zero separation.
A depth-7 tab follows the same boundary as the depth-7 pocket.
The depth-9 tab enters the other solid. The red band is actual overlap.