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obsQRity
A daily puzzle played on a real QR code
Every board is a working QR code. Tap a light area and it fills in dark. That corrupts the data, but the code keeps scanning right up to the Reed-Solomon error correction limit. Your score is how many moves you make before it breaks. A solver finds the exact maximum for each puzzle, so a perfect game is a real target. Four difficulty levels change only what you see. A bigger code on Sundays. Free, no account, no cookies, no analytics scripts. Scan any board mid-game and it opens that puzzle.
Top comment
Hi! I came up with this at my kitchen table, scribbling over a QR code in a newspaper ad and scanning it to see if it still worked. It led to the question: how much damage can one QR code take before it breaks? There's an exact answer, and obsQRity turns it into a daily puzzle. Every board is a working QR code. A tap fills a whole light area, areas straddle bricks (bytes), so you're choosing which bricks to sacrifice. On Hard you can't even see them. A solver works out the true maximum, and real decoders confirm the code still reads at the limit. No account, no cookies, no analytics scripts. Your score lives on your device. I published it this week and would love feedback, especially from anyone who teaches math or CS. Thanks!
About obsQRity on Product Hunt
“A daily puzzle played on a real QR code”
obsQRity was submitted on Product Hunt and earned 2 upvotes and 1 comments, placing #159 on the daily leaderboard. Every board is a working QR code. Tap a light area and it fills in dark. That corrupts the data, but the code keeps scanning right up to the Reed-Solomon error correction limit. Your score is how many moves you make before it breaks. A solver finds the exact maximum for each puzzle, so a perfect game is a real target. Four difficulty levels change only what you see. A bigger code on Sundays. Free, no account, no cookies, no analytics scripts. Scan any board mid-game and it opens that puzzle.
On the analytics side, obsQRity competes within Puzzle Games, Education and Games — topics that collectively have 182.7k followers on Product Hunt. The dashboard above tracks how obsQRity performed against the three products that launched closest to it on the same day.
Who hunted obsQRity?
obsQRity was hunted by Patrick Keane. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of obsQRity including community comment highlights and product details, visit the product overview.