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53rd Honinbo title

Preliminary finals

date black white result #mv sgf
1997-07-10 Chino Tadahiko O Rissei W+1.5 284 sgf
1997-07-31 Yamada Kimio Honda Kunihisa B+R 179 sgf
1997-08-07 Oya Koichi O Meien W+R 158 sgf
1997-08-28 Takemiya Masaki Kobayashi Satoru W+2.5 188 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. Kato Masao 2-5 B+3.5 B+R W+R W+R
2. Ryu Shikun 3-4 B+R B+2.5 W+R
3. Hikosaka Naoto 4-3 W+R W+3.5 B+R B+R
4. Cho Sonjin 1-6 B+R B+R B+R
5. Kobayashi Satoru 4-3 W+R B+R B+R B+R
6. O Rissei 5-2 W+1.5 W+R B+R
7. O Meien 5-2 W+5.5 W+R B+0.5 W+R
8. Yamada Kimio 4-3 W+R W+7.5 B+3.5

Demotion Playoff

The bottom four players are demoted: Cho Sonjin, Kato Masao, Ryu Shikun and one more. Yamada Kimio and Kobayashi Satoru played a playoff lost by Yamada Kimio.

date black white result #mv sgf
1998-04-06 Yamada Kimio Kobayashi Satoru W+6.5

Challenger Playoff

Both O Rissei and O Meien had 5 wins. They played a challenger playoff won by O Rissei.

date black white result #mv sgf
1998-04-06 O Rissei O Meien B+1.5 301 sgf

53rd Honinbo Title

date black white result #mv sgf
1998-05-21,22 Cho Chikun O Rissei B+R 167 sgf
1998-06-01,02 O Rissei Cho Chikun W+R 148 sgf
1998-06-11,12 Cho Chikun O Rissei W+R 162 sgf
1998-06-22,23 O Rissei Cho Chikun W+R 166 sgf
1998-06-29,30 Cho Chikun O Rissei W+R 172 sgf
1998-07-13,14 O Rissei Cho Chikun W+R 154 sgf

Cho Chikun won with 4-2.