Can you score?
A picture quiz: nine photos, one question, and exactly four of them answer it. Which ones?
About us
Two friends who like making things
We're just two extremely curious guys who constantly challenge one another, so 9to4 is the natural continuation of our struggle: nine photos, four right answers, and a lot of friendly arguing.
We keep adding topics, and we're making each new one quicker to build, so there's always a round about something you love.
Got an idea, a topic you'd like to play, a feature you're missing, or something that's wrong? We'd love to hear it.
Topics
What you can play
Pick a topic on the home screen or in the menu; more are coming.
How to play
Nine photos, four belong
- Each round shows 9 photos and asks one question about them: which 4 are in Italy?, which 4 are over 3,500 m?, which 4 date back to before 1300?, which 4 are in the Alps? Exactly 4 are right.
- Tap the 4 you think are right and press Check. The magnifier on a photo shows more of it (up to 3 photos each). Or swipe through them one at a time: right for yes, left for no; tap the photo at either side to look before you decide.
- The wrong ones are close to the right ones (the nearest countries, the peaks just under the height, the years just after), so they look alike: that's the game.
- Stuck? Three hints, each free once a day and then paid for with points (Names 3, Remove one 2, Any wrong? 3): Names shows 4 of the 9 names, Remove one takes a wrong photo out, and Any wrong? says whether any photo you've picked is wrong (not which).
Modes
Daily or Endless
- Daily: one round a day for each topic and level, the same for everyone, so you can compare with friends. Its question changes from day to day. Share your grid when you're done.
- Streak: play a daily round, in any topic, on days in a row and your streak grows. Miss a day and it starts again.
- Endless: as many rounds as you like, each with its own question.
Levels
Easy, Hard, GG
- Easy: the best-known 10% of a topic, by how often their Wikipedia articles are read.
- Hard: the best-known 35%.
- GG: everything in the topic, most of which you've never heard of.
On questions about a number (a height, a year), the level also sets how close the wrong ones are: hundreds of metres or years away on Easy, a few dozen on GG.
Points
How a round is scored
- +1
- for each right pick
- +5
- for all four right (√9 + √4 = 5)
- −1
- for each wrong pick
- ×2
- what a round wins on Hard
- ×3
- what a round wins on GG
- +5
- for a photo you report that turns out wrong (we take it out)
So on Easy: 4 right is 9 points, 3 right 2, 2 right 0, 1 right −2 and none −4. Hard doubles the wins (18 for a perfect round, 4 for 3 right) and GG triples them (27, 6); a round that loses points loses the same on every level. Your points never go below 0.
Points pay for hints: each hint is free once a day, then Names costs 3 points, Remove one 2 and Any wrong? 3. Achievements count every point you've won, so spending them on hints doesn't set you back.
Profile
Your profile and achievements
Everything you identify correctly goes into your profile, topic by topic. See how much of each part of a topic you've collected, and open anything's photos again. Achievements come in two sets: each topic's own, and those across all topics (perfect rounds, streaks, collecting in every topic).
Sources
Where the photos and facts come from
Every photo is from Wikimedia Commons, shared by thousands of photographers under free licenses. Each photo's author and license are shown in its gallery and after the round, with a link to the photo's page on Commons. The facts (where each thing is, its height or year, its mountain range) come from Wikidata (CC0), and how well known each one is from how often its Wikipedia articles are read.
Photos are chosen automatically, and a program checks that each one shows the thing itself rather than a sign or a statue, so the odd mistake slips through: the Report link in a photo's gallery tells us. If we agree and take it out, you get 5 points for it.
Privacy
What we keep
- You can play without an account. On your first visit you get a random, anonymous id, kept in your browser's storage and in a cookie, so your profile is still there when you come back.
- Under that id we store the rounds you check (your picks and points), what you've collected, any photos you report and where your first visit came from (say, a shared link or the site that linked here). Nothing else: no name and no email.
- Usage stats, only if you allow them. On your first visit we ask whether you'd like to help with anonymous usage stats. Only if you tap Allow does the game load Google Analytics, which sets its own cookies and tells Google how the game is played: which screens you open, the level and topic, your points and whether you shared. Never your id, name or email.
- Signing in is optional. If you sign in with Google, we keep only the id Google gives us for your account, so your profile follows you to other devices. We don't receive or keep your email or your name. Google's sign-in is only loaded when you choose to sign in.
- If you sign in with an email link instead, your address is used once, to send that email (through our email provider, Resend), and isn't stored: we keep only a one-way fingerprint of it, so the same address finds your account again.
- Delete my account (in your profile, when signed in) deletes the account and everything kept for it: what you've collected, points, rounds and reports. Signing out keeps them for your next sign-in.
- Without an account, clearing this site's data in your browser starts you afresh, and a different browser or device gets a new profile.
- Questions about your data: support@9to4.app.