diff --git a/game.py b/game.py
index cb79fed..b765a52 100644
--- a/game.py
+++ b/game.py
@@ -96,8 +96,10 @@ class Series():
 class Round():
     def __init__(self, round_number: int, first_player: int, cards: []=cards, shuffler = shuffle): 
         # vyrob kopku pre toto kolo a priprav prazdne objekty
-        if not 0 <= round_number < 8:
-            raise BridzikException('Round number has to be between 0 and 7.')
+        if round_number not in [i for i in range(8)]:
+            raise BridzikException('Neplatne cislo kola.')
+        if first_player not in [0, 1, 2, 3]:
+            raise BridzikException('Cislo hraca musi byt 0, 1, 2 alebo 3.')
         self.round_number = round_number
         self.first_player = first_player
         self.deal_starting_cards(cards, shuffler)