Graded go problems 3

Graded go problems for beginners 3. Yano Yoshinori, 9 dan - Kiseido 1997 - anglais - 199 p. Chap. 1 : Intermediate problems, level 1 Chap. 2 : Intermediate problems, level 2 Chap. 3 : Intermediate problems, level 3, life and death problems Chap. 4 : Intermediate problems, level 4, life and death problems