Along with playing games, practice is essential for mastering go technique; namely, practice in analyzing positions and reading out all their variations.
However, the practice players get from their games is limited, whereas problem books can give the amateur go player a vast variety of positions that might occur in their games.
Practice also keeps the mind sharp and in top form.
This is the reason professionals are always solving problems and often spend considerable time composing them.
Kiseido Publishing Company One thousand and one life-and-death problems, paperback/richard bozulich
