CREATE TABLE table_name_77 (opening VARCHAR(255), tournament VARCHAR(255), white VARCHAR(255), year VARCHAR(255))
What is Opening, when White is Kramnik, when Year is less than 2001, and when Tournament is "Siemens Giants"?
    
SQL: SELECT opening FROM table_name_77 WHERE white = "kramnik" AND year < 2001 AND tournament = "siemens giants"