Contact happens often throughout a game and most players screw it up royally. One sees dan players making mistakes with rules a 20 kyu could master. Obviously there is a need for a thorough training on the subject - this is it!

About the length of 7 Go books, Sector Fights takes you thorough training in sector lines, attack and defense of groups, attack and defense of potential territory, and the partial and whole board strategies involving interrelations among sectors, including the Great Wall Opening.