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54th Honinbo title

Preliminary finals

date black white result #mv sgf
1998-06-18 Ishida Akira Yoda Norimoto B+2.5 221 sgf
1998-07-16 Yamada Kimio Ishida Yoshio B+R 147 sgf
1998-08-13 Otake Hideo Cho Sonjin W+R 196 sgf
1998-08-20 Yamashiro Hiroshi Ryu Shikun W+2.5 245 sgf

League

In the first column the white player, on the top row the black player.

# player result 1 2 3 4 5 6 7 8
1. O Rissei 4-3 W+R W+R W+R B+R
2. O Meien 1-6 B+R B+R B+R
3. Hikosaka Naoto 5-2 B+R W+R W+0.5 B+R
4. Kobayashi Satoru 1-6 W+4.5 B+R B+4.5
5. Yamada Kimio 4-3 W+R B+R B+R B+R
6. Ishida Akira 4-3 W+5.5 W+R B+R
7. Cho Sonjin 5-2 W+2.5 B+R B+3.5 W+1.5
8. Ryu Shikun 4-3 B+4.5 W+R B+4.5

Demotion Playoff

The bottom four players are demoted: O Meien and Kobayashi Satoru and two more. Three players with 4 wins played a demotion playoff. Ishida Akira and Ryu Shikun lost.

date black white result #mv sgf
1999-04-05 Ishida Akira Ryu Shikun W+R 180 sgf
1999-04-08 Yamada Kimio Ryu Shikun B+R 219 sgf

Challenger Playoff

Both Hikosaka Naoto and Cho Sonjin had 5 wins. They played a challenger playoff won by Cho Sonjin.

date black white result #mv sgf
1999-04-05 Cho Sonjin Hikosaka Naoto B+R 219 sgf

54th Honinbo Title

date black white result #mv sgf
1999-05-12,13 Cho Chikun Cho Sonjin B+6.5 239 sgf
1999-05-24,25 Cho Sonjin Cho Chikun B+R 203 sgf
1999-05-31,06-01 Cho Chikun Cho Sonjin B+7.5 231 sgf
1999-06-10,11 Cho Sonjin Cho Chikun B+0.5 284 sgf
1999-06-22,23 Cho Chikun Cho Sonjin W+2.5 254 sgf
1999-07-05,06 Cho Sonjin Cho Chikun B+R 163 sgf

Cho Sonjin won with 4-2.