Clear the pyramid by pairing to 13.
Goal. Remove all 28 pyramid cards by pairing them in combinations that sum to thirteen.
Card values. A=1, J=11, Q=12, K=13. The valid pairs: A+Q · 2+J · 3+10 · 4+9 · 5+8 · 6+7. Kings clear alone (no pair needed).
Free cards. A card is free (and tappable) only when both cards directly below it are gone. Covered cards are dimmed. The bottom row is always free.
The stock. When you're stuck, tap the stock to flip a card to the waste. Pyramid cards can pair with the waste's top card.
Winning & losing. Clear all 28 cards to win. The game ends if no valid pair exists anywhere (stock empty + no usable adjacencies).