CREATE TABLE table_66955 ("Year" FLOAT, "Team" CLOB, "Chassis" CLOB, "Engine" CLOB, "Rank" CLOB, "Points" FLOAT)

Which engine scored 6 points and used the march 88c chassis?
SELECT "Engine" FROM table_66955 WHERE "Points" = '6' AND "Chassis" = 'march 88c'
SELECT "Engine" FROM "table_66955" WHERE "Chassis" = 'march 88c' AND "Points" = '6'