Judging card centering is hard! This game helps you tune your intuition.
You'll be shown cards with simulated centering shifts. Your job is to decide whether it still passes as a PSA 10.
PSA 1050/50 to 55/45 on both axes
PSA 956/44 to 60/40 on either axis
Loading cards…
Privacy Notice
Centering Game uses privacy-friendly analytics to understand how the
site is used and how difficult the game is.
What is collected
Page views and referrers, such as where a visit came from.
When a game starts, including selected game settings.
When a game finishes, including settings and final score.
Individual answers, including left/right and top/bottom centering
values, chosen grade, actual grade, and whether the answer was
correct.
What is not collected
No advertising trackers.
No analytics cookies.
No names, email addresses, or account details.
Analytics are processed by Umami Cloud. The data is used only to
improve the game.