Instant-runoff voting
Voting method for single-seat elections, where voters rank the candidates in order of preference; ballots are initially counted for each voter’s top choice, losers are eliminated one-by-one, with losers' ballots redistributed till 1 candidate remains
Instant-runoff voting (IRV) is a type of ranked preferential vote counting method used in single-seat elections with more than two candidates. IRV is also sometimes referred to as the alternative vote (AV), preferential voting, or in the United States, ranked-choice voting (RCV), though these names are also used for other systems. Like all ranked ballot voting systems, instead of indicating suppor... Wikipedia