CREATE TABLE table_203_644 (id DECIMAL, "pos." DECIMAL, "driver" TEXT, "co-driver" TEXT, "car" TEXT, "time" TEXT, "difference" TEXT, "points" DECIMAL)

which driver and co driver have the most points ?
SELECT "driver", "co-driver" FROM table_203_644 ORDER BY "points" DESC LIMIT 1
SELECT "driver", "co-driver" FROM "table_203_644" ORDER BY "points" DESC NULLS LAST LIMIT 1