CREATE TABLE table_41103 ("Year" FLOAT, "Winning team" TEXT, "Losing team" TEXT, "Score" TEXT, "Site" TEXT)

When has a Site of tainan city and a Score of 8 6?
SELECT "Year" FROM table_41103 WHERE "Site" = 'tainan city' AND "Score" = '8–6'
SELECT "Year" FROM "table_41103" WHERE "Score" = '8–6' AND "Site" = 'tainan city'