Solitaire, also known as Klondike, is the most widely played card game in the world. Its roots go back to 18th-century Europe, but it became a global household name when it shipped with Microsoft Windows 3.0 in 1990 — reportedly to help new computer users practice mouse skills.
The game is played with a single standard 52-card deck. Cards are dealt into seven tableau piles with the goal of moving all 52 cards to four foundation piles, building each one up by suit from ace to king. Although it looks casual, only about 80% of randomly dealt deals are actually winnable.
Controls: Click or drag cards between piles. Click the stock pile to draw new cards. Double-click (desktop) or long-press (mobile) a card to send it automatically to the foundation when possible.
Objective: Move every card to the four foundation piles, building each from ace to king in its own suit. You win when all four foundations are complete.