The game of Go is, occasionally, referred to as a sitting martial art. This series of books is dedicated to kyū ranked players and uses the following colors to represent belt colors often used in martial arts rating systems: white (beginner), yellow, orange, green, blue and then brown.

Blue is the color of water. The game is fluid and testifies to unbridled and dangerous power. This book requires the student to correctly assess the forces and to pay attention to the interactions of the positions. Concentration and reading are required.

This books can be used as a classroom tutorial, as an after-school exercise, or as a test for self-learners who would like to improve their skills.