Sixteen cards lie face down, hiding eight matching pairs of symbols. Flip two at a time: a match stays face up, a miss flips back after a second. Find all eight pairs to win. Your move count is the score, and fewer moves means a better best.
Tips
A missed pair stays visible for a full second. Spend it memorizing both symbols and their spots instead of rushing the next flip.
Anchor memories to places, not order: think "rainbow, top right corner" rather than "third card I saw".
When a flip reveals a new symbol, check it against every earlier sighting before committing your second card.
A lucky perfect run is eight moves. Anything under fifteen is a strong score without luck on your side.