diff --git a/src/database/location.lua b/src/database/location.lua
index 06f6e49..6fb6a71 100644
--- a/src/database/location.lua
+++ b/src/database/location.lua
@@ -28,6 +28,7 @@ end
 
 function C:setItem(item)
   item.placed = true
+  item.location_name = self.name
   self.item = item
 end
 
diff --git a/src/database/world_graph.lua b/src/database/world_graph.lua
index 3dad09d..05abd5c 100644
--- a/src/database/world_graph.lua
+++ b/src/database/world_graph.lua
@@ -695,9 +695,11 @@ function worldGraph:writeItems(tscFiles)
   self.hintregion:writeItems(tscFiles)
 end
 
-function worldGraph:collect(preCollectedItems)
-  local collected = _.clone(preCollectedItems) or {}
-  local availableLocations = self:getFilledLocations()
+function worldGraph:collect(preCollectedItems, locations, singleSphere)
+  local collected = _.clone(preCollectedItems, singleSphere) or {}
+  local availableLocations = locations or self:getFilledLocations()
+
+  local inventory = (singleSphere and preCollectedItems) or collected
 
   local foundItems = 0
   repeat
@@ -707,7 +709,7 @@ function worldGraph:collect(preCollectedItems)
     local j, n = 1, #availableLocations
     for i = 1, n do
       local location = availableLocations[i]
-      if location:canAccess(collected) then
+      if location:canAccess(inventory) then
         table.insert(collected, location.item)
         foundItems = foundItems + 1
         availableLocations[i] = nil
@@ -724,7 +726,7 @@ function worldGraph:collect(preCollectedItems)
   --[[local s = "Collected items: "
   for k,v in ipairs(collected) do s = s .. v.name .. ", " end
   logDebug(s)]]
-  return collected
+  return collected, availableLocations
 end
 
 function worldGraph.locationsArray(locations)
diff --git a/src/log.lua b/src/log.lua
index c2f5086..9aceb38 100644
--- a/src/log.lua
+++ b/src/log.lua
@@ -1,4 +1,4 @@
-local LOG_LEVEL, _logCounts, _logLines = 4, nil, nil
+local LOG_LEVEL, _logCounts, _logLines = 6, nil, nil
 local function _log(level, prefix, text, ...)
   if LOG_LEVEL >= level then
     local text = prefix .. text
@@ -13,8 +13,10 @@ function logError(...)   _log(1, 'ERROR: ',   ...) end
 function logWarning(...) _log(2, 'WARNING: ', ...) end
 function logNotice(...)  _log(3, 'NOTICE: ',  ...) end
 function logSpoiler(...) _log(4, 'SPOILER: ', ...) end
-function logInfo(...)    _log(5, 'INFO: ',    ...) end
-function logDebug(...)   _log(6, 'DEBUG: ',   ...) end
+function logSphere(...)  _log(5, 'SPHERE: ',  ...) end
+function logRoute(...)   _log(6, 'ROUTE: ',   ...) end
+function logInfo(...)    _log(7, 'INFO: ',    ...) end
+function logDebug(...)   _log(8, 'DEBUG: ',   ...) end
 function countLogWarningsAndErrors()
   return _logCounts[2], _logCounts[1]
 end
@@ -22,7 +24,7 @@ function getLogText()
   return table.concat(_logLines, "\r\n")
 end
 function resetLog()
-  _logCounts = {0, 0, 0, 0, 0, 0}
+  _logCounts = {0, 0, 0, 0, 0, 0, 0, 0}
   _logLines = {}
 end
 resetLog()
\ No newline at end of file
diff --git a/src/randomizer.lua b/src/randomizer.lua
index f074378..5906fba 100644
--- a/src/randomizer.lua
+++ b/src/randomizer.lua
@@ -77,6 +77,9 @@ function C:randomize()
   self:_generateHash()
   if self.shuffleMusic then self.music:shuffleMusic(tscFiles) end
 
+  self:_analyzeSpheres()
+  self:_generateRoute()
+
   self:_writeModifiedData(tscFiles)
   self:_writePlaintext(tscFiles)
   self:_writeLog()
@@ -231,7 +234,7 @@ function C:_fillItems(items, locations)
 
     local filter = function(k,v) return not v:hasItem() and v:canAccess(assumed) end
 
-    if self.completableLogic and self.worldGraph:canBeatGame(assumed) then
+    if self.completableLogic and self.worldGraph:canBeatGame(assumed, self.obj) then
       filter = function(k,v) return not v:hasItem() end
     end
 
@@ -256,6 +259,35 @@ function C:_fastFillItems(items, locations)
   end
 end
 
+function C:_analyzeSpheres()
+  local spheres = {}
+  local items = {}
+  local locations
+
+  local i = 0
+  repeat
+    i = i+1
+    
+    local collected
+    collected, locations = self.worldGraph:collect(items, locations, true)
+    local sphereItems = _.difference(collected, items)
+    items = collected
+
+    if #sphereItems == 0 then break end
+
+    logSphere(("Sphere %i"):format(i))
+    for k,v in pairs(sphereItems) do
+      if not self.worldGraph:_has({v}, "abstract") then
+        logSphere(("\t %s: %s"):format(v.location_name, v.name))
+      end
+    end
+  until false
+end
+
+function C:_generateRoute()
+  return
+end
+
 function C:_generateHints()
   local toHint = _.shuffle(self.worldGraph:getHintableLocations(self.obj))
   for k, hintLocation in ipairs(_.shuffle(self.worldGraph:getHintLocations())) do