Klondike solitaire is a highly engaging single-player card game that uses a standard 52-card deck. The goal is to sort all the cards into the four foundation piles, one for each suit—diamonds, clubs, hearts, and spades. Players must arrange the cards in each foundation in ascending sequence, starting with the ace and ending with the king. It's a classic and challenging game that tests strategy and patience, often keeping players hooked as they work through the layout to achieve the winning arrangement. Simple yet compelling, Klondike remains a timeless favorite among solitaire enthusiasts.