Do I have to express a preference in every head-to-head matchup?
Selecting your preferred candidate in each head-to-head matchup gives you more say in who wins and represents you.
Unlike other voting methods, with head-to-head matchups voters can express their preferences honestly for the candidates they like most AND still have a say about the ones they like least.
Every preference each voter gives matters. Every head-to-head preference a voter marks is counted in that matchup. If you prefer A over B, your preference counts in A vs. B. If you prefer A over C, your preference counts in A vs. C. If you prefer B over C, your preference counts in B vs. C. That means your views do not disappear because of an elimination round and each comparison is counted directly and publicly verifiable. It also means that voters can express their preferences honestly. Voting your true preferences cannot help a candidate you prefer less defeat a candidate you prefer more.
Candidates have respect and make some appeal to every voter. Because even if a candidate knows you won’t help him against one of his rivals, that doesn’t mean you won’t help him against the other.