Cocoa Stuff has released an update to Deep Green Chess adding iPad support and optimizing the app for the iPhone 4 and fourth-generation iPod touch Retina Display. Deep Green Chess is designed for the casual chess player and allows users to play chess against the game engine with adjustable strength and concentration settings for differing challenge levels. Users can also manually setup the board, replay a previous move or an entire game and choose to either tap or drag to move pieces. Suggested moves are available and the game can optionally provide callout notifications or vibration on check, stalemate and checkmate. Two skins are included and the latest version provides a new default skin rendering the board and each piece in impressive high-resolution detail. Deep Green Chess is available from the App Store for $8.