Hard to explain but picture this:
2x2 (can see/shoot only outside of wall in direction of wall.):
p
--------sx--------
xx
3x3 (can see/shoot inside and outside of wall in direction of wall.):
p sxx
--------xxx--------
xxx
p=prisoner
s=sniper
x=guard tower
-=perimeter wall
Hope someone figured out what I meant
edit. doh! seems like forum don't like too many spaces in text...broke my ascii blueprint





