CREATE TABLE table_200_31 (id DECIMAL, "result" TEXT, "record" TEXT, "opponent" TEXT, "method" TEXT, "date" TEXT, "round" DECIMAL, "time" TEXT, "event" TEXT, "location" TEXT, "notes" TEXT)

who was the only person that scheider lost against ?
SELECT "opponent" FROM table_200_31 WHERE "result" = 'loss'
SELECT "opponent" FROM "table_200_31" WHERE "result" = 'loss'