Which Year is the highest one that has a Venue of blackwolf run, composite course, and a Score of 281?
CREATE TABLE "winners" (
  "year" real,
  "champion" text,
  "country" text,
  "venue" text,
  "location" text,
  "score" text,
  "to_par" text,
  "purse" real,
  "winner_s_share" real
);
SELECT MAX("year") FROM "winners" WHERE "venue"='blackwolf run, composite course' AND "score"='281';