Solitaire – meditative brain training. The most famous card game for single players, is primarily played in the Klondike variant and is also known in the spellings Solitair or Solitaire. The goal is to place all cards in ascending order on the ace piles. Before that, the cards on the playing field must be sorted in descending order with alternating colors. Start our free Solitaire now and find the right solution even for challenging card shuffles.