diff --git a/bridzik.py b/bridzik.py
index 08c6a0e..381483b 100644
--- a/bridzik.py
+++ b/bridzik.py
@@ -188,6 +188,8 @@ class Round():
             raise BridzikException('Pre tohto hraca uz bol zadany tip.')
         if player != self.get_active_player():
             raise BridzikException('Nie je mozne pridat tip mimo poradia.')
+        if guess < 0 or guess > 8 - self.round_number:
+            raise BridzikException('Tip musi byt vacsi ako 0 a nie vacsia ako pocet kariet.')
         if len(self.guesses) < 3:
             self.guesses[player] = guess
         elif 8 - self.round_number != guess + sum([self.guesses[player] for player in self.guesses]):