This game is a great example of a common line in the Cambridge Springs Defense where White opts to exchange on d5. Some writers have suggested that this is White's best try for an edge.
As this game demonstrates, Black gets a playable game with good chances. The line must be handled with care, however. As late as move 18, Black's queenside Rook and Bishop were idle. How and when these pieces are developed is key to whether Black will maintain his chances.
If you study this game and the annotations, you will get a good idea of some important themes in this line.