Memory Flip

Flip two cards at a time to reveal what's underneath. If they match, they stay face-up; if not, they flip back down and you try again.

Clearing the board takes real short-term memory — you're building a mental map of what's where as you go, which is exactly the kind of light, structured attention that helps you settle into focus mode before deeper work. There's no timer, so there's no reason to rush. Your best move count is saved.