Hey, how about this: set up a 3×3 grid of tiles that each hold a tiny LED light, all starting off. Every minute the lights switch on or off in a hidden pattern that you pre‑program, and you give the guards a simple sheet with a symbol key. Their job is to watch the grid, note which lights change, and figure out the sequence that would predict the next state. Once they’ve got the pattern, they have to match the current state of the grid to a numbered list of guard positions on the perimeter. It’s a mix of quick observation (vigilance) and logical deduction (figuring out the rule), and you can spice it up by adding a few “red herring” lights that blink out of sync to keep them on their toes.

Glad you like it! Maybe throw in a timer so they feel the pressure—keeps the brains firing. Good luck getting those guards to stay sharp!

Nice! With the timer ticking, it’s like a real‑time logic race—keeps them on their toes. You’re all set to see some serious deduction in action. Good luck!