CREATE TABLE table_1172 ("Nationality" TEXT, "Player" TEXT, "Year" FLOAT, "Wins" FLOAT, "Masters" TEXT, "U.S. Open" TEXT, "Open Ch." TEXT, "PGA Ch." TEXT)

What was the player's result at the U.S. Open of the player who finished 6th at the Open Ch?
SELECT "U.S. Open" FROM table_1172 WHERE "Open Ch." = '6th'
SELECT "U.S. Open" FROM "table_1172" WHERE "Open Ch." = '6th'