diff --git a/cogs/sacrifice/sacrifice.py b/cogs/sacrifice/sacrifice.py
index a80079c..4865e5c 100644
--- a/cogs/sacrifice/sacrifice.py
+++ b/cogs/sacrifice/sacrifice.py
@@ -117,7 +117,8 @@ class SacrificeCog(commands.Cog):
 
     @staticmethod
     def expection(d):
-        return 1/(1+math.pow(10, -d/400))  # https://fr.wikipedia.org/wiki/Classement_Elo#Relation_entre_diff%C3%A9rence_de_points_Elo_et_probabilit%C3%A9_de_gain
+        # https://fr.wikipedia.org/wiki/Classement_Elo#Relation_entre_diff%C3%A9rence_de_points_Elo_et_probabilit%C3%A9_de_gain
+        return 1/(1+math.pow(10, -d/400))
 
     async def win(self, winner_id: str, looser_id: str) -> None:
         elo_winner = await self.get_elo(winner_id)
@@ -143,5 +144,5 @@ class SacrificeCog(commands.Cog):
         if discord_id in elos:
             return elos[discord_id]
         else:
-            # calculate new elo
+            # set new elo = 1500
             return 1500