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Roast SlowA coffee journal · Vol. III

Free daily game

Perfect Shot

Hold to pre-infuse, then cut the shot the moment the stream blondes. Three shots, new beans every day, same machine for everyone. Want the whole ritual? Switch to the full bench and dial the grinder, weigh the dose, stir out the clumps, level and tamp it yourself.

Warming up the machine…

Why your score keeps saying “sour”

The game is rigged the same way real espresso is. Cut a shot short and you get the acids without the sweetness; let it run and the bitter compounds catch up. If the game has you curious about the real thing, start with why espresso runs sour or bitter — then, when you're ready to pull shots for real, the Bambino vs Gaggia head-to-head settles the first-machine question. Prefer numbers to reflexes? Our coffee ratio calculator is the other kind of dialing in.

Common questions

How do you play Perfect Shot?
Hold to pre-infuse, release inside the green zone, then tap to cut the shot as the stream turns pale. That's it — three shots, and your score is the average. If you want the whole ritual, switch to the full bench: set the grinder from the roaster's hint, hold to grind toward today's dose and tap to knock in the last 0.1g, stir the WDT needle to break up clumps, release the spinning leveler when the bubble centers, and tamp into the pressure zone before you pull.
What's the difference between quick mode and the full bench?
Quick mode is the pure timing game — the portafilter is already prepped and locked in, so you only pre-infuse and cut. It takes about thirty seconds. The full bench adds the five prep steps a real barista does before the shot, and prep errors physically change the pull: a coarse grind gushes, a sloppy WDT makes the stream sputter, and a bad tamp shrinks the window you have to cut in. Quick scores out of bloom 25 + cut 75; the bench splits it prep 45 + bloom 15 + cut 40.
What is WDT and why does the game make me stir the coffee?
WDT (Weiss Distribution Technique) is stirring the grounds with fine needles to break up clumps before tamping. Clumpy, uneven grounds channel — water rips through the loose spots and skips the dense ones — so the shot runs sour and bitter at the same time. In the game, skipping clumps makes the pressure needle wobble and the stream sputter on the pull, just like channeling on a real machine.
What does 'blonding' mean in espresso?
Blonding is when the espresso stream turns from dark honey to pale straw — a sign that most of what's left to extract is bitter. Real baristas often cut the shot as the stream blondes, and that's exactly the timing skill the game trains. On the last shot the meter disappears and you're down to the stream and the scale, just like a real machine.
How does dialing in the grinder work?
The roaster's card gives you a range, but the exact setting the beans want is hidden — you find it by reading the shot, exactly like real dialing in. Too coarse and the shot gushes (runs fast, cut window shrinks); too fine and it crawls. The result screen tells you which way to move for the next shot.
Is it the same game for everyone each day?
Yes. Everything — dose target, ideal grind setting, clump layout, tamp zone, extraction speed — is generated from the date, so everyone in the world preps and pulls the same shots on the same day. That's why scores are comparable and why the share line says Daily #N.
Does a fast or slow shot really make espresso sour or bitter?
Under-extracted espresso (cut short or ground too coarse) tastes sour because the acids come out first; over-extracted espresso (run long or ground too fine) turns bitter as harsher compounds extract late. Our troubleshooting guide walks through fixing both on a real machine.