TriPeaks (also known as Three Peaks, TriTowers or Triple Peaks) is a solitaire card game that is akin to the solitaire games Golf and Black Hole.

The game goal is to clear all cards placed in the top three peaks. To remove a card, simply tap on one of the cards in the peak that is 1 different from the card in the foundation(Shapes and colors are ignored). If you don't have a matching card pair, you can move it to the foundation by tapping the card with the arrow at the far right of the stock.
If no cards remain in the stock and no cards match the game ends with a failure. King and Ace (1) are considered to have a 1 rank difference. You can also undo as many as shown above the ‘Undo’ button.