Spider Solitaire – four suits
The classic hard spider solitaire with all four suits. You can move a run only in one suit, so a careless drop can bury a card you need.
How the hard game plays
Placing still allows any suit on a rank one higher. Moving still requires a same-suit descending run. From ten columns you must finish eight king-to-ace runs — two of each suit.
An empty column is the most important play. Leave the stock alone until the tableau has no useful move.