Forsake Materialism

Has anyone read "Chess for Zebras". This is a very great book. I put in up there next to "My System". One part of the book gives a different way to think about losing the exchange. Say you lost your Rook for a Bishop. The player with the extra Rook must now prove that the Rook, in the resulting position, is stronger than the Bishop. And you must try to prove the opposite. Usually the extra exchange prevails, but not always. Rowson explains it more eloquently. In the following game az2112 could have given up a Rook for a Knight and gotten a large advantage.