diff --git a/src/SinglePasses.hs b/src/SinglePasses.hs
new file mode 100644
index 0000000..ee2bec5
--- /dev/null
+++ b/src/SinglePasses.hs
@@ -0,0 +1,59 @@
+{-# LANGUAGE DeriveDataTypeable #-}  
+module SinglePasses where
+
+import Data.Set(Set(..),difference,union,toList,empty) 
+import Data.Maybe
+import Data.Typeable
+import qualified Datatypes as DT
+import qualified VM
+
+data Cell = Cell { x :: Int, y :: Int}
+            deriving (Show, Typeable)
+                    
+data Output = Output {  width   :: Int,
+                        height  :: Int,
+                        filled  :: [Cell],
+                        touched :: [Cell],
+                        unit    :: [Cell],
+                        score   :: Int
+                   }
+             deriving (Show, Typeable)
+
+passes :: [(DT.Game, VM.Notes)] -> [Output]
+passes gamesnotes = map generateoutput (gameswithtouched gamesnotes)
+               where
+                 generateoutput ((game,note),touched) = Output { width   = DT.width $ DT.board game,
+                                                                 height  = DT.height $ DT.board game,
+                                                                 filled  = filledcells game,
+                                                                 touched = touchedcells touched,
+                                                                 unit    = unitcells game,
+                                                                 score   = DT.points game
+                                                               }
+                 filledcells  gm = extractcell $ DT.filled $ DT.board gm  
+                 unitcells    gm = if null $ DT.units gm 
+                                   then []
+                                   else extractunit $ head $ DT.units gm
+                 touchedcells tc = extractcell tc
+
+gameswithtouched :: [(DT.Game,VM.Notes)] -> [((DT.Game,VM.Notes),Set DT.Cell)]
+gameswithtouched [] = []
+gameswithtouched (x:[]) = [(x,empty)]
+gameswithtouched (x:xs) = (x,touched):lastels
+  where
+    touched1 = snd $ head lastels
+    touched2 = if null $ DT.units $ fst $ fst $ head lastels
+               then empty
+               else DT.members $ head $ DT.units $ fst $ fst $ head lastels
+    touched  = difference (difference (union touched1 touched2) cells) units
+    cells    = DT.filled $ DT.board $ fst x
+    units    = if null $ DT.units $ fst x 
+               then empty
+               else  DT.members $ head $ DT.units $ fst x
+    touchedcells tc = extractcell touched
+    lastels  = gameswithtouched xs 
+
+extractunit :: DT.Unit -> [Cell] 
+extractunit unit = extractcell $ DT.members unit
+
+extractcell :: Set DT.Cell -> [Cell]
+extractcell cell = map (\(x,y) -> Cell x y) (toList cell)