CREATE TABLE table_35559 ("Date" TEXT, "Placing" TEXT, "Beat by" TEXT, "Location" TEXT, "Distance" TEXT)

What was the date in which Chic won at CHS?
SELECT "Date" FROM table_35559 WHERE "Beat by" = 'won' AND "Location" = 'chs'
SELECT "Date" FROM "table_35559" WHERE "Beat by" = 'won' AND "Location" = 'chs'