The Post-it switch, made real — STAR: Blue, now also the score co-leader¶

Generated from bv2178_8kg698_star.yaml — do not edit by hand. Regenerate: python STARVote_LH_tabulation_engine/tools_adam/scripts/build_yaml_pages.py.

Method: STAR (single winner) · 1 seat · Expected winner: Blue

▶ Live on BetterVoting: vote · results ↗ (election 8kg698 · test BV2178).

Scenario¶

One of four races in the Post-it switch election (BV2178, bvid 8kg698; BV-confirmed) — the BV2176/BV2177 electorate from Equal Vote's video "Updated: How does RCV work? — With Post-its!" (https://youtu.be/Vte4nly_Neg) with exactly TWO of the six Green>Blue>Pink voters flipping their top two (to Blue>Green>Pink; scores 0,4,5,3). The video's round-2 hypothetical ("what if Green were eliminated instead of Blue?") becomes the actual RCV-IRV count in the companion race — and STAR barely moves: scores are now Blue 46, Purple 46, Pink 44, Green 36; the two co-leaders are exactly the two finalists (no tiebreak needed — both advance) and Blue wins the same runoff as in BV2176, 10-9. The flip that upended RCV-IRV's whole story merely swapped which finalist tops the scoring round: Blue stops being a Runoff Reversal winner and becomes the score co-leader. See the fairness lesson page: postit_video_fair_and_balanced.md.

Live results: https://bettervoting.com/8kg698/results Companion races: bv2178_8kg698_irv.yaml, bv2178_8kg698_ranked_robin.yaml. Overview page: bv2178_8kg698_switch_made_real.md

Ballots¶

Row 1 = candidate names; each later row is one voter's 0–5 scores (a N × prefix = N identical ballots).

Purple,Green,Blue,Pink
5,0,0,0
5,0,0,0
5,0,0,0
5,0,0,0
5,0,0,0
5,0,0,0
5,0,0,0
0,5,4,3
0,5,4,3
0,5,4,3
0,5,4,3
0,4,5,3
0,4,5,3
0,0,5,4
0,0,5,4
0,4,5,3
4,0,5,0
3,4,0,5
4,0,0,5
0,0,0,5

What the engine says¶

The count, step by step — the rounds and how the winner is reached:

[Divergence from STAR]
  STAR                   = Blue
  Choose-One (Plurality) = Purple   (differs from STAR)
  Approval               = Pink   (differs from STAR)

--- STAR Voting Method (single winner) ---

[STAR Voting]
 Tabulating 20 ballots.
Count × Purple,Green,Blue,Pink
    7 ×      5,    0,   0,   0
    4 ×      0,    5,   4,   3
    3 ×      0,    4,   5,   3
    2 ×      0,    0,   5,   4
    1 ×      4,    0,   5,   0
    1 ×      3,    4,   0,   5
    1 ×      4,    0,   0,   5
    1 ×      0,    0,   0,   5

[STAR Voting: Scoring Round]
 The two highest-scoring candidates advance to the next round.
   Blue          -- 46 -- First place
   Purple        -- 46 -- Second place
   Pink          -- 44
   Green         -- 36
 Blue and Purple advance.

[STAR Voting: Automatic Runoff Round]
 The candidate preferred in the most head-to-head matchups wins.
   Blue          -- 10 -- First place
   Purple        --  9
   Equal Support --  1
 Blue wins.
   Runoff math:
     20  ballots cast
   −  1  Equal Support (no preference between the two finalists)
     ──
     19  voters with a preference  (majority = 10)
           Blue 10 (53%)  ·  Purple 9 (47%)

[STAR Voting: Winner — STAR Voting Method (single winner)]
 Blue

Full audit — preference matrix, Condorcet, and score distribution¶

--- Runoff (Preference) Matrix ---
Head-to-head / pairwise comparison
Legend: For - Equal Support - Against
        * indicates Top 2 Finalist
                 |   * Purple   |    Green    |   * Blue    |     Pink    |
---------------------------------------------------------------------------
      * Purple > |     ---      | 9 -  3 -  8 | 9 -  1 - 10 | 8 -  0 - 12 |
         Green > |  8 -  3 -  9 |    ---      | 5 -  9 -  6 | 7 -  8 -  5 |
        * Blue > | 10 -  1 -  9 | 6 -  9 -  5 |    ---      |10 -  7 -  3 |
          Pink > | 12 -  0 -  8 | 5 -  8 -  7 | 3 -  7 - 10 |    ---      |

[Condorcet Winner]
  Condorcet Winner: Blue — matches the STAR winner

[Score Distribution] (how many ballots gave each star rating)
                   Score
Candidate   5   4   3   2   1   0  | Total   Avg
Purple      7   2   1   0   0  10  |    46   2.3
Green       4   4   0   0   0  12  |    36   1.8
Blue        6   4   0   0   0  10  |    46   2.3
Pink        3   2   7   0   0   8  |    44   2.2

Everything in one file: the _tabulated mirror (regenerated on every run; every analysis forced on).

Run it yourself:

python STARVote_LH_tabulation_engine/starvote_larry_hastings.py method_comparisons/postit_rcv_example/cases/bv2178_8kg698_star.yaml

The Post-it switch, made real — STAR: Blue, now also the score co-leader¶

Scenario¶

Ballots¶

What the engine says¶

Full audit — preference matrix, Condorcet, and score distribution¶

See also¶