Mobile gaming developer Order of Leisure has launched King’s Corners for the iPhone and iPod touch, a unique iOS adaptation on the classic solitaire game. King’s Corners challenges players to strategically play cards onto a 4×4 playing board, trying to position face cards at the corners and edges—Queens at the top and bottom, Jacks on the sides and Kings in each corner. A “card reserve” option also provides a new twist on the classic game, allowing players a reserve card slot to make the game easier at lower difficulty levels. The iOS version provides a step-by-step tutorial, detailed Retina Display graphics and multiple background options. An accomplishment and challenges system is also available with Game Center integration along with multiple difficulty levels and a point system. King’s Corners requires iOS 4.2 or later and is available from the App Store for $2.