Stones is a game developed by Michael C. Miller and released in 1991 as part of Microsoft

Microsoft

Microsoft Corporation is an American public multinational corporation headquartered in Redmond, Washington, USA that develops, manufactures, licenses, and supports a wide range of products and services predominantly related to computing through its various product divisions...

's Windows Entertainment Pack 2. Its object is to place 90 tiles, or "stones", on a board. A tile can only be placed if it shares two of three attributes - color

Color

Color or colour is the visual perceptual property corresponding in humans to the categories called red, green, blue and others. Color derives from the spectrum of light interacting in the eye with the spectral sensitivities of the light receptors...

, shape

Shape

The shape of an object located in some space is a geometrical description of the part of that space occupied by the object, as determined by its external boundary – abstracting from location and orientation in space, size, and other properties such as colour, content, and material...

, or the like - with every adjacent tile. Wild tiles may be placed anywhere regardless of attributes. The game is won when all tiles are placed or when there are no valid spaces to place the next tile.

In 2010 the game had been redone by Michael C. Miller for the Windows Phone 7 platform.