diff --git a/src/Skat/AI/Online.hs b/src/Skat/AI/Online.hs
index 509f7b8..3cc3c5b 100644
--- a/src/Skat/AI/Online.hs
+++ b/src/Skat/AI/Online.hs
@@ -119,7 +119,8 @@ choose :: (HasCard b, HasCard a) => (Communicator c, MonadPlayer m) => [CardS Pl
 choose table mayOuvert hand' = do
     gm <- game
     let hand = sortRender (getTrump gm) $ map toCard hand'
-    query (BS.unpack $ encode $ ChooseQuery hand table $ fmap (map toCard) mayOuvert)
+        ouvertCards = fmap (sortRender (getTrump gm) . map toCard) mayOuvert
+    query (BS.unpack $ encode $ ChooseQuery hand table ouvertCards)
     r <- response
     case decode (BS.pack r) of
         Just (ChosenResponse card) -> do
diff --git a/src/Skat/Card.hs b/src/Skat/Card.hs
index d1c27d1..db9f458 100644
--- a/src/Skat/Card.hs
+++ b/src/Skat/Card.hs
@@ -177,7 +177,7 @@ compareRender trump c1@(Card tp1 col1) c2@(Card tp2 col2) =
             EQ -> compare col1 col2
             v  -> v
         (False, False) -> case compare col1 col2 of
-                            EQ -> compare tp1 tp2
+                            EQ -> compareTypes trump tp1 tp2
                             v  -> v
         _ -> compare trp1 trp2
   where trp1 = isTrump trump c1
@@ -198,12 +198,15 @@ compareTypes None tp1 tp2 = compare (toNullType tp1) (toNullType tp2)
           toNullType Ace = NAce
 compareTypes _ tp1 tp2 = compare tp1 tp2
 
+-- | ascending sort of cards, depending on turn colour
 sortCards :: HasCard c => Trump -> Maybe TurnColour -> [c] -> [c]
 sortCards trump turnCol cs = sortBy f cs
     where f c1 c2 = compareCards trump turnCol (toCard c1) (toCard c2)
 
+-- | descending sort of cards, independent of turn colour
 sortRender :: HasCard c => Trump -> [c] -> [c]
 sortRender trump cs = sortBy f cs
+    -- note: reversed order of c1 and c2 to get a descending sort
     where f c1 c2 = compareRender trump (toCard c2) (toCard c1)
 
 highestCard :: HasCard c => Trump -> Maybe TurnColour -> [c] -> c