We all know the three fortification types :
Adjacent, Chained & Unlimited.
I would like to suggest others, such as:
DAdjacent - Double Adjacent
TAdjacent - Triple Adjacent
DChained - Double Chained
TChained - Triple Chained.
As opposed to the current 'Single' Adjacent/Chained.
Meaning the 'Double' forts allow up to 2 Adjacent or Chained fortifications & the 'Triple' forts allow up to 3 Adjacent or Chained fortifications.
A next step medium between the over-restrained singular & the limitless.
Call it bounded multiplicity.
