Update: TicTacToe2 solution

Author: Vic-Nas

kattis/TicTacToe2/tictactoe2.vn.py

@@ -31,11 +31,10 @@
     wins = {
         "O": False,
         "X": False,
-        ".": None
     }
 
     for i, j, k in lines:
-        if grid[i]==grid[j]==grid[k]:
+        if grid[i]==grid[j]==grid[k] and grid[i] in "X0":
             wins[grid[i]] = True
 
     # X wins