The World's Most Instructive Amateur Game Book - Dan HeismanThe World's Most Instructive Amateur Game Book by Dan Heisman Who says that you cant learn from the games of amateurs? Renowned chess instructor and writer Dan Heisman presents thirty games by intermediate level players, each one offering a rich variety of lessons in practical competitive play for all chess enthusiasts. The catalog of errors runs the gamut from taking too much (or too little!) time to think, to shoddy calculation, cutting off analysis