diff --git a/bingo/__init__.py b/bingo/__init__.py
index 22b2536..bfea606 100644
--- a/bingo/__init__.py
+++ b/bingo/__init__.py
@@ -30,3 +30,15 @@ class Board:
             for row in range(5):
                 if self.cols[col][row] == n:
                     self.called[col][row] = True
+
+    def has_bingo(self):
+        for i in range(5):
+            all_col = True
+            all_row = True
+            for j in range(5):
+                if not self.called[i][j]:
+                    all_col = False
+                if not self.called[j][i]:
+                    all_row = False
+            if all_col or all_row:
+                return True