i lIke the chess engine analysis but it would be better if it could tell what level was the game in rating base or any other base
You mean you want a rating based on one game? So that one game you win by a checkmate with two bishops (a 1600 rating) and then when you blunder your queen and lose to a backrank mate (a 200 rating)?
Try this thread: http://www.chess.com/forum/view/general/khow-your-approx-rating
Some people seem to like it.
i lIke the chess engine analysis but it would be better if it could tell what level was the game in rating base or any other base