CREATE TABLE table_6666 ("Season" TEXT, "Competition" TEXT, "Round" TEXT, "Club" TEXT, "Score" TEXT)

Which Competition has a 2nd round score of 1:0, 0:1 (4:3 a.p.)?
SELECT "Competition" FROM table_6666 WHERE "Round" = '2nd round' AND "Score" = '1:0, 0:1 (4:3 a.p.)'
SELECT "Competition" FROM "table_6666" WHERE "Round" = '2nd round' AND "Score" = '1:0, 0:1 (4:3 a.p.)'