election_title: "P3 manipulated — Zwicker's complete reversal makes Dublin a 4-0 Condorcet winner"
scenario_description: |-
  The book's own printed manipulation. One of the two sincere Athens>Bergen>Cork>Dublin>Edinburgh voters completely REVERSES their ballot to Edinburgh>Dublin>Cork>Bergen>Athens. That single reversed ballot flips two knife-edge 4-3 contests (Athens vs Dublin and Cork vs Dublin), and Dublin goes from 2-2 to 4-0: a symmetric Copeland score of +4, the maximum possible for five candidates, and now an outright Condorcet winner. The manipulator has replaced their LAST choice (Edinburgh) with their 4th (Dublin) — a strict gain — by submitting a ballot that misrepresents every single pairwise preference they hold. IMPORTANT for this repo: Ranked Robin IS Copeland plus a tiebreak, so the book's showcase manipulation is a manipulation of a method this library advocates.
voting_method: RankedRobin
num_winners: 1
lot_numbers: [Athens, Bergen, Cork, Dublin, Edinburgh]
ballots: |-
  2:Edinburgh>Cork>Athens>Dublin>Bergen
  3:Dublin>Edinburgh>Bergen>Cork>Athens
  1:Athens>Bergen>Cork>Dublin>Edinburgh
  1:Edinburgh>Dublin>Cork>Bergen>Athens

expected_winners:
  - Dublin

# file: p3_manip_reversal_rr.yaml