When playing computer chess software I find myself wondering "who's winning right now according to the computer?". For example: I make a bad move but I don't realize it yet - but the computer looking 5 moves ahead immediately realizes that I've made a terrible mistake.
The computer AI must have this information internally (it's own evaluation of the current board position). Is there an example of a computer chess game that shows this (ideally for iPhone so I can teach myself while on the train)?