CREATE TABLE table_56624 ("Res." CLOB, "Record" CLOB, "Opponent" CLOB, "Method" CLOB, "Event" CLOB, "Round" FLOAT, "Time" CLOB, "Location" CLOB)

How many rounds did the event rings: king of kings 2000 block a have with a record of 6-1?
SELECT "Round" FROM table_56624 WHERE "Event" = 'rings: king of kings 2000 block a' AND "Record" = '6-1'
SELECT "Round" FROM "table_56624" WHERE "Event" = 'rings: king of kings 2000 block a' AND "Record" = '6-1'