There are several varitions of the rules to be found, but these rules offer fun Klondike-like game play.
One deck of cards
Object: Play all cards to the foundation.
Tableau: 13 piles.
Rank is built down. Cards must alternate suit color.
If a pile is empty, you can play a king.
You can pick up and play a group of cards in sequence.
Foundation: 4 piles.
Play "ace" cards to empty piles.
Rank is built up. Cards must match the same suit.