Pyramid Solitaire
The add-to-13 classic, free in your browser — no download. Then build your castle in Solitaire Castle Royal.
How to play: remove pairs of exposed cards whose ranks add up to 13 (A=1, J=11, Q=12). A King is worth 13, so it clears on its own. A card is exposed once nothing overlaps it. Tap the stock to deal a card to the waste — the waste card can pair too. Clear the whole pyramid to win.

