Add missing check for zero games in elo surprise calc

uestccokey · Jul 13, 2023 · 2fbfb5d · 2fbfb5d
1 parent eccf20c
commit 2fbfb5d
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/python/elo.py b/python/elo.py
@@ -71,6 +71,8 @@ def get_log10_odds_surprise_max_likelihood(self, p1: Player, p2: Player, g1: flo
         A value of -3.0 means that g1 is smaller larger than we would expect given the players' estimated Elos, such that a result
         that extreme or more has less than 1 : 10^3.0 odds of happening under the posterior.
         """
+        if total <= 0:
+            return 0
         mean = self.get_elo_difference(p1,p2) / ELO_PER_STRENGTH
 
         max_likelihood_winprob = 1.0 / (1.0 + math.exp(-mean))