1 || loss of support, EASY_BRIDGES off
3 | span 3,1 falls because its only support is gone
4 | the other spans still have support
6 | trigger a bulletin as a separator
8 | now span 2,2 falls, because both its heads are gone
11 | head damaged below 20%
12 | span 1,3 falls, because its other head is redesignated
15 | span -2,2 falls, because its other head is damaged
17 | trigger a bulletin as a separator
20 | span -1,-1 falls, because its only support is gone
21 | span 0,2 falls, because its other head is damaged
23 | trigger a bulletin as a separator