CREATE TABLE table_203_285 (id DECIMAL, "year" DECIMAL, "location" TEXT, "gold" TEXT, "silver" TEXT, "bronze" TEXT)

how long is the time between the times the championship was held in moscow ?
SELECT MAX("year") - MIN("year") FROM table_203_285 WHERE "location" = 'moscow'
SELECT MAX("year") - MIN("year") FROM "table_203_285" WHERE "location" = 'moscow'