The duel
Which pour wins?
Two lattes, one tap, no names. You find out who poured what after you vote. Every vote nudges the Elo of both pours and both baristas.
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Rankings
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tap a pour, or use ← → · skip this pair · 150 duels judged by everyone
How the rating works elo, like chess
Every pour starts at 1200. When you pick a winner, the loser hands over points: beating a higher-rated pour pays more than beating a lower-rated one. New pours move fast for their first ten duels, then settle. Judging is blind: you never see who made a pour, or its rating, until you have voted. Baristas carry their own rating, moved by the same duels, so the rankings reflect who is pouring well over time rather than who has the most friends liking their posts.