Takagawa beats Go Seigen by a rule.

White: Go-Seigen, 9-dan

Black: Honinbo Shukaku[JH1] , 8-dan

Fig 3 (99-122) 102 takes ko, 104 connects ko Dia. 18 13 connects at the left of 11

Fig. 3. ( 99-122 ) Black 101: If Black finishes ko with this move, then White will play as in Dia. 18. Black can live but White can play '14’ and be satisfied. Compare up to 105 in Fig. 3 with Dia. 16 ; the Black group is caught by White, but Black could develop his center territory and still be superior to White.      Every move is very difficult at the moment. Black finally decided to sacrifice his group at the upper left and planned to encircle territory . White 110: Causing some aji around here, White seeks a. chance to play 117. If directly White 1 in Dia. 19, he may have no success. Dia. 19 Dia. 19: Through 6 White will be captured. Dia. 20 : 12 at 4, 13 takes, 15 connects     Dia. 20; If immediately White 1, ( 117 in Fig. 3) , up to 18, White will also be captured.      White 122: To avoid Black 'a' and the cut. A good move. So black should have played it with his 121.

Next figure

---

[JH1] A name for Takagawa Kaku when he had won the Honinbo title