You are shown 16 player names from the CardVault database. Your goal is to group them into 4 categories of 4 players each. Categories might be players from the same sport, same decade, same card set, same value tier, or other shared attributes. Tap 4 players and hit Submit to guess. Correct groups are revealed instantly.

You have 4 mistakes before the game ends. Each incorrect guess costs one life. If you use all 4, the remaining groups are revealed automatically. A perfect game means solving all 4 groups with zero mistakes.

Each group has a difficulty color: yellow (easiest), green (medium), blue (hard), and purple (trickiest). The colors are assigned based on how non-obvious the category is. Typically, sport-based or decade-based groups are easier, while name patterns or value tiers are harder.

Yes! The daily puzzle uses a date-based seed so every player sees the same 16 names and same 4 categories. This means you can share your results with friends and compare strategies. Switch to Random mode for unlimited practice puzzles.

Categories are algorithmically generated from the CardVault database of 7,500+ sports cards. Possible themes include same sport, same debut decade, rookie card holders, same card set, value tiers, name patterns, and mixed-sport groups. Each puzzle is unique and balanced.