Cho Hun-Hyun's Lectures on the Opening, v. 1

There is something inexhaustible aboout go. There have been many games played, but no two games have been the same. Those who wish to improve rapidly at go may find this a disadvantage. If you are familiar with a certain formation, your confidence in maneuvering in it increases. But if a position is unfamiliar, you may be confused as to whether your tactics are good or not. In an important game, it is normal to stay with well-known plays. However you will often meet novel shapes in real games. Then your true level of play is tested. One of the best ways to improve is to experiment with new plays in games. This is time-consuming, and the benefit you gain from it does depend on your innate talent. The very best way is to concentrate on study of the fundamentals and common shapes. It is for amateurs, not professionals, and their needs are considered throughout.