36 cards. 18 pairs. Match them all.
36 cards are laid face-down in a 6×6 grid. Flip two at a time — if the colors match, they disappear.
18 color pairs are hidden in the deck. No outcast — every card has a match.
Each card shows how many times it has been flipped on its face-down side.
Clear all 18 pairs as fast as you can. The last matched color is revealed at the end.