In CB14 while putting together a DB comprising games between players ELO 2349-3400, I find that no matter how I filter or search-delete, etc., I cannot get rid of games whose players show no ELO at all; moreover, such games persist in every ELO 2349-3400 filtered result.  I could go through manually and delete each one, but that's thousands and thousands and thousands of games.  Any ideas on how to remove those non-ELO games?  Thanks in advance.