election_title: "Exercise 1 — Two districts, one mayor: the COMBINED city"
bv_test_id: BV2190
bv_election_id: 923q3d
bv_results_url: https://bettervoting.com/923q3d/results

scenario_description: |-
  All 18 ballots — West and East together. Both districts separately elect
  Avery, but combined the runner-ups change: Blake (33) only exists in West and
  Diego (33) only in East, while Carmen scores 32 in BOTH — so citywide it is
  Avery 70 vs Carmen 64 in the runoff, and Carmen wins it 10-8 head-to-head.
  STAR fails the CONSISTENCY criterion: winning every district does not
  guarantee winning the whole. (Note this is NOT a summability failure — score
  totals and the preference matrix still add across precincts; what you cannot
  add is each district's declared winner.) Part 3 of 3 of the consistency
  exercise (ex01_two_districts.md). Ballots adapted from a RangeVoting.org
  example, posed as an exercise in Brendan W. Sullivan, "An Introduction to
  the Math of Voting Methods" (2022), ch. 5.
  Live on BetterVoting (Test ID BV2190): https://bettervoting.com/923q3d/results
  — the election carries a second, Ranked Robin race on the same opinions
  (equal ranks allowed): Elena, the citywide Condorcet winner, wins it 4-0.
voting_method: STAR
num_winners: 1
ballots: |-
  Avery,Blake,Carmen,Diego,Elena
  3,3,4,0,5 # 5 West voters: Elena first, Carmen second, Avery = Blake
  3,3,4,0,5
  3,3,4,0,5
  3,3,4,0,5
  3,3,4,0,5
  5,5,3,0,0 # 3 West voters: Avery = Blake at the top, Carmen third
  5,5,3,0,0
  5,5,3,0,0
  5,3,3,0,0 # 1 West voter: Avery over Blake
  3,0,4,3,5 # 5 East voters: Elena first, Carmen second, Avery = Diego
  3,0,4,3,5
  3,0,4,3,5
  3,0,4,3,5
  3,0,4,3,5
  5,0,3,5,0 # 3 East voters: Avery = Diego at the top, Carmen third
  5,0,3,5,0
  5,0,3,5,0
  5,0,3,3,0 # 1 East voter: Avery over Diego
expected_winners:
  - Carmen

# file: ex01_district_combined.yaml