anchor.diff:  232,X,Southeast Surface
   233,X,Southeast Surface
   234,X,Southeast Surface
  -235,,
  -236,,
  +235,X,Fox Den
  +236,X,Northern Islands
   237,X,Southeast Surface
   238,X,Southeast Surface
   239,X,Southeast Surface
  -240,,
  +240,X,northern Islands
   241,X,Southeast Surface
   242,X,Southeast Surface
   243,X,Southeast Surface
  
positive.code: 247,X,Southeast Surface
  248,X,Southeast Surface
  249,X,Southeast Surface
  250,,
  251,X,Southeast Surface
  252,X,Southeast Surface
  253,X,Southeast Surface
  
negative.code: 266,X,Volcano
  267,X,Cadomyr
  268,X,Akaltuts
  269,X,Ronagan Dungeon
  270,X,Akaltuts
  271,,
  272,X,Southwest Mountains 1
  