SOLITAIRE, which is called Patience in England, is a one-person card game with many variations.
The most popular version is called Klondike Solitaire. This is the game that people generally know simply as “solitaire”.
Pyramid solitaire is a version of solitaire that begins with the cards dealt in the shape of a pyramid or triangle.
Another popular solitaire game commonly played online is FreeCell. FreeCell is a challenging game that requires that the player plans several moves ahead. FreeCell requires more skill and mental energy than Klondike.
There are lots of places to play solitaire online. The best place to play for free to win prizes is GameDuell. One good free game is available at World of Solitaire. Some sites offer tournament-style games where you can compete for cash or prizes, depending on your mood or inclination.
Some players prefer to download shareware programs from software sites like download.com and then play offline. These types of games normally offer a free trial period, then require purchase to continue playing.