Caissa is a native chess game for Apple’s iPhone.

Changes:

new icon
new middle-ware layer, dropped experimental support for Xboard protocol
bug fix for crash when undoing intensively
game status view
Human vs. Human mode
Black vs. Computer
On undo, when pawn is being promoted, ExtraPieceView will hide now
Memory leak when promoting pawn to queen fixed.

http://byteeasy.com/projects/wiki/Caissa