When has a Tournament venue of richmond arena, and a Record of 12–1, and a Regular Season Champion(s) of virginia tech?
CREATE TABLE "champions_by_year" (
  "year" text,
  "regular_season_champion_s" text,
  "record" text,
  "tournament_champion" text,
  "tournament_venue" text,
  "tournament_city" text
);
SELECT "year" FROM "champions_by_year" WHERE "tournament_venue"='richmond arena' AND "record"='12–1' AND "regular_season_champion_s"='virginia tech';