Two-party-preferred vote

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Instant-runoff (preferential) voting method. TPP/TCP vote is calculated when two candidates remain.

Two-party preferred vote is a system of electing someone for a political office. It is mainly used in Australia. The idea is that there at some stage in the voting process, there are two candidates. If there are more than two candidates, all except the best two will be eliminated. Their votes will be distributed on those of the remaining two candidates.