====================================================================== SOURCE FILE: ex11_spoiler_added.yaml TABULATED FILE: ex11_spoiler_added_tabulated.txt ====================================================================== election_title: "Exercise 11 — Recruit a spoiler: Axl enters the race" bv_test_id: BV2198 bv_election_id: 93gjx6 bv_results_url: https://bettervoting.com/93gjx6/results scenario_description: |- The same nine voters as ex11_two_way_base.yaml, plus a third name on the ballot: Axl, a near-clone of Alba (recruited, in the exercise's story, by Brett's campaign to split Alba's vote). Alba's five-voter camp splits its FIRST choices 3-2 between the clones but scores both 4-5; Brett's four voters are unchanged. Choose-One now elects BRETT (4 first choices vs 3 and 2) — the spoiler worked. STAR shrugs: scoring round Alba 23, Axl 22, Brett 20 — the CAMP keeps both finalist slots and the runoff is Alba vs Axl, which Alba wins 3-2 (Brett's four voters score the clones 0-0: Equal Support). RCV-IRV also survives this one: Axl is eliminated first and his votes come home to Alba — crowding by pure clones is the one spoiler variant IRV genuinely handles. The dirty trick only pays under Choose-One. (Axl shares Alba's initial ON PURPOSE — they are clones; the distinct-initials naming rule yields to the lesson here.) Exercise: ex11_recruit_a_spoiler.md. Ballots and cast are this repo's own. Live on BetterVoting (Test ID BV2198): https://bettervoting.com/93gjx6/results — four races: Choose-One falls for the clone (Brett); RCV-IRV, STAR, and Ranked Robin all hold (Alba). voting_method: STAR num_winners: 1 ballots: |- Alba,Axl,Brett 5,4,0 # 3 voters: Alba's camp, Alba first among the clones 5,4,0 5,4,0 4,5,0 # 2 voters: Alba's camp, Axl first among the clones 4,5,0 0,0,5 # 4 voters: Brett's camp, unchanged 0,0,5 0,0,5 0,0,5 expected_winners: - Alba # file: ex11_spoiler_added.yaml ====================================================================== TABULATION RESULTS ====================================================================== === Exercise 11 — Recruit a spoiler: Axl enters the race === The same nine voters as ex11_two_way_base.yaml, plus a third name on the ballot: Axl, a near-clone of Alba (recruited, in the exercise's story, by Brett's campaign to split Alba's vote). Alba's five-voter camp splits its FIRST choices 3-2 between the clones but scores both 4-5; Brett's four voters are unchanged. Choose-One now elects BRETT (4 first choices vs 3 and 2) — the spoiler worked. STAR shrugs: scoring round Alba 23, Axl 22, Brett 20 — the CAMP keeps both finalist slots and the runoff is Alba vs Axl, which Alba wins 3-2 (Brett's four voters score the clones 0-0: Equal Support). RCV-IRV also survives this one: Axl is eliminated first and his votes come home to Alba — crowding by pure clones is the one spoiler variant IRV genuinely handles. The dirty trick only pays under Choose-One. (Axl shares Alba's initial ON PURPOSE — they are clones; the distinct-initials naming rule yields to the lesson here.) Exercise: ex11_recruit_a_spoiler.md. Ballots and cast are this repo's own. Live on BetterVoting (Test ID BV2198): https://bettervoting.com/93gjx6/results — four races: Choose-One falls for the clone (Brett); RCV-IRV, STAR, and Ranked Robin all hold (Alba). --- Runoff (Preference) Matrix --- Head-to-head / pairwise comparison Legend: For - Equal Support - Against * indicates Top 2 Finalist | * Alba | * Axl | Brett | ----------------------------------------------------- * Alba > | --- |3 - 4 - 2 |5 - 0 - 4 | * Axl > | 2 - 4 - 3 | --- |5 - 0 - 4 | Brett > | 4 - 0 - 5 |4 - 0 - 5 | --- | [Condorcet Winner] Condorcet Winner: Alba — matches the STAR winner [Condorcet Loser] Condorcet Loser: Brett — loses every head-to-head matchup — elected by Choose-One (Plurality)! [Divergence from STAR] STAR = Alba Choose-One (Plurality) = Brett (differs from STAR) --- STAR Voting Method (single winner) --- [STAR Voting] Tabulating 9 ballots. Count × Alba,Axl,Brett 4 × 0, 0, 5 3 × 5, 4, 0 2 × 4, 5, 0 [Score Distribution] (how many ballots gave each star rating) Score Candidate 5 4 3 2 1 0 | Total Avg Alba 3 2 0 0 0 4 | 23 2.6 Axl 2 3 0 0 0 4 | 22 2.4 Brett 4 0 0 0 0 5 | 20 2.2 [STAR Voting: Scoring Round] The two highest-scoring candidates advance to the next round. Alba -- 23 -- First place Axl -- 22 -- Second place Brett -- 20 Alba and Axl advance. [STAR Voting: Automatic Runoff Round] The candidate preferred in the most head-to-head matchups wins. Alba -- 3 -- First place Axl -- 2 Equal Support -- 4 Alba wins. Runoff math: 9 ballots cast − 4 Equal Support (no preference between the two finalists) ─ 5 voters with a preference (majority = 3) Alba 3 (60%) · Axl 2 (40%) [STAR Voting: Winner — STAR Voting Method (single winner)] Alba