Klondike Solitaire is the world's most iconic card game — the one most people simply call "Solitaire." Originally popularised during the Klondike Gold Rush of 1896, it gained a global audience when Microsoft bundled it with Windows 3.0 in 1990, making it one of the most-played games in history.
The goal: move all 52 cards onto four foundation piles — one per suit — in ascending order from Ace to King. Simple in concept, endlessly absorbing in practice.