It requires a tape-cassette player or some such means of recording one s voice. One analyzes a position, speaking and recording every thought, whether tactical specifics or positional generalities, up to a set time limit. The requirement of thinking and speaking simultaneously can be difficult at first, and some practice may be needed. Once comfortable with it, the student takes on a number of exercises. The book then provides a method for evaluating one s thought processes, by comparing them with optimal analysis.
Important concepts are the hierarchy of moves and the formula of successive solving propositions .
These are best explained by example. Consider this position chosen for clarity. In this simple case, for candidate moves we can consider all legal possibilities. Bxg2 or 2. In other words a is clearly best, superior to b and c which are roughly equal, d is clearly inferior to b or c , and e is immediately disastrous.