Guess if a player won.

        Find what team the player was on. If anyone
        on their team resigned, assume the player lost.

def guess_winner(self, i):
        """Guess if a player won.

        Find what team the player was on. If anyone
        on their team resigned, assume the player lost.
        """
        for team in self.get_teams():
            if i not in team:
                continue
            for p in team:
                if p in self._cache['resigned']:
                    return False
        return True