|This article's lead section may not adequately summarize key points of its contents. (January 2016)|
|A component of Microsoft Windows|
FreeCell on Windows 7
|Included with||Windows 95 up to Windows 7|
|Replaced by||Microsoft Solitaire Collection (Windows 10)|
|Hearts, Solitaire, Spider Solitaire|
The first computer version of the game is believed to have been created by Paul Alfille in 1978 for the PLATO system. Microsoft developer Jim Horne, who learned the game from the PLATO system, implemented a version with color graphics for Windows. It was first included in Microsoft Entertainment Pack Volume 2 and later the Best Of Microsoft Entertainment Pack. It was subsequently included with Win32s as an application that enabled the testing of the 32-bit thunking layer to ensure that it was installed properly. However, FreeCell remained relatively obscure until it was released as part of Windows 95. In Windows XP, FreeCell was extended to support a total of 1 million card deals.
Today, there are FreeCell implementations for nearly every modern operating system as it is one of the few games pre-installed with every copy of Windows. Prior to Windows Vista, the versions for Windows were limited in their player assistance features, such as retraction of moves. The Windows Vista FreeCell implementation contains basic hints and unlimited move retraction (via the Undo menu choice or command), and the option to restart the game. Some features have been removed, such as the flashing screen to warn the player of one move remaining. FreeCell is not included in the Windows 8 operating system but is available in the Windows Store as the free Microsoft Solitaire Collection, which is also bundled with Windows 10.
The original Microsoft FreeCell package includes 32,000 games, generated by a 15-bit, pseudorandom-number seed. These games are known as the "Microsoft 32,000". All but one of these hands have been completed. Later versions of FreeCell include more than one million hands. When Microsoft FreeCell became very popular during the 1990s, the Internet FreeCell Project attempted to solve all the deals by crowdsourcing consecutive games to specific people. The project ran from August 1994 to April 1995, and only one game proved unwinnable. Out of the current Microsoft Windows games, eight are unsolvable.
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