Klondike is a patience game (solitaire card game). In the U.S. and Canada, Klondike is known as solitaire, being one of the better known of the family of patience games.

After shuffling a standard 52-card deck (without Jokers), seven piles of cards are laid from left to right. Each pile begins with one upturned card. From left to right, each pile contains one more card than the last. The first and left-most pile contains a single upturned card, the second pile contains two cards (one downturned, one upturned), the third contains three (two downturned, one upturned), and so on, until the seventh pile which contains seven cards (six downturned, one upturned).

The four foundations (light rectangles in the upper right of the figure) are built up by suit from Ace (low in this game) to King, and the tableau piles can be built down by alternate colors, and partial or complete piles can be moved if they are built down by alternate colors also. Any empty piles can be filled with a King or a pile of cards with a King.

The aim of the game is to build up a stack of cards starting with two and ending with King, all of the same suit. Once this is accomplished, the goal is to move this to a foundation, where the player has previously placed the Ace of that suit. Once the player has done this, they will have "finished" that suit, the goal being, of course, to finish all suits, at which time the player would have won.

Scoring:

Waste to Tableau = 5 points
Waste to Foundation = 10 points
Tableau to Foundation = 10 points
Turn over Tableau card = 5 points
Foundation to Tableau = -15 points
Recycle waste in Draw 1 Mode = -100 points
Recycle waste in Draw 3 Mode = -25 points
Undo = -20 points