Like my Apportiomment Methods Visualized post, each of the fallowing diagrams represent who would win under different combinations of three groups of voters:

Candidate A Candidate B Candidate C Group 1 10/10 0/10 3/10 Group 2 7/10 10/10 0/10 Group 3 0/10 5/10 10/10

The fallowing ternary plots show which candidate will win when the 3 different groups make up different portions of the electorate. The group in the top left is group 1, the group in the top right is group 2, and the bottom group is group 3.

IRV:

Bucklin Voting:

Borda Count:

FPTP, Minimax, Schulze, Ranked Pairs, and Coombs Method (they all produce the same results when the only 3 types of votes form a cycle):

Approval Voting (where group 3 can’t make up their mind between approving C and disapproving C so half approve C and half disapprove C):

Score Voting:

Approval Runoff Voting (what’s being proposed in St. Louis):

STAR Voting (on a 0 to 10 scale instead of 0 to 5):

In the future, I will create plots of some multi-winner methods as well using the same three groups of voters.