If you want an extremely difficult challenge, do not move completed sequences of cards to a foundation. You can also win by leaving the same eight sequences in the tableau. This is harder because there are fewer empty piles available. In fact, it is nearly impossible.
Erronka gogorra nahi baduzu, ez mugitu oinarrira osatutako karta-segidak. Zortzi segidak mahaian utzita ere irabazten da. Hori zailagoa da, pila huts gutxiago baitago erabilgarri. Egia esan, ia-ia ezinezkoa da.