Graded Go Problems for Dan Players 4, Life and Death
In a life and death problem, there are many candidate moves to choose from. For each of these moves you must consider all of your opponent's responses, and to each of these responses you have to find a counter, and so on, until you arrive at the solution. This entails a lot of mental dexterity that can be developed only by constant practice, and the most efficient way of developing this dexterity is to solve a large number of problems starting out with easy ones and gradually progressing to more difficult ones.
Author: Richard Bozulich