CREATE TABLE table_77539 ("Rider" TEXT, "Horse" TEXT, "Faults" TEXT, "Round 1 Points" TEXT, "Total" FLOAT)

Tell me the rider with 18.185 points round 1
SELECT "Rider" FROM table_77539 WHERE "Round 1 Points" = '18.185'
SELECT "Rider" FROM "table_77539" WHERE "Round 1 Points" = '18.185'