CREATE TABLE table_6156 ("Round" FLOAT, "Player" CLOB, "Position" CLOB, "Nationality" CLOB, "College/Junior/Club Team" CLOB)

What is the total number of rounds that Center position Denis Arkhipov have?
SELECT COUNT("Round") FROM table_6156 WHERE "Position" = 'center' AND "Player" = 'denis arkhipov'
SELECT COUNT("Round") FROM "table_6156" WHERE "Player" = 'denis arkhipov' AND "Position" = 'center'