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6th Honinbo title

Preliminaries

There were two preliminary stages. The 1st preliminary was a knockout tournament with five groups. The winners were Sakata Eio, Mitsuhara Itaro, Miyashita Shuyo, Shinohara Masami and Magari Reiki. These five joined the five with a 3-3 score in last year's Honinbo League. A 3-round 2nd preliminary was played, where players who lost twice were eliminated, and players who won twice gained access to the League. These were Kitani, Sakata, Fujisawa, Hasegawa, and Takagawa. The 6th player in the League was last year's losing challenger, Iwamoto.

Below the 2nd preliminary. Notation is as for a Swiss system match.

player R1 R2 R3
1. Kitani Minoru +2 +3
2. Takagawa Kaku −1 +4 +6
3. Mitsuhara Itaro +5 −1 −4
4. Fujisawa Hosai +6 −2 +3
5. Hasegawa Akira −3 +7 +9
6. Miyashita Shuyo −4 +8 −2
7. Shinohara Masami −9 −5
8. Hayashi Yutaro −10 −6
9. Magari Reiki +7 −10 −5
10. Sakata Eio +8 +9

League

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

# player result 1 2 3 4 5 6
1. Kitani Minoru 3-2 W+5.5 B+3.5 W+R
2. Hasegawa Akira 3-2 W+3.5 B+R W+R
3. Sakata Eio 3-2 B+2.5 W+3.5
4. Fujisawa Hosai 2-3 B+3.5 B+R
5. Iwamoto Kaoru 2-3 W+R B+R B+3.5
6. Takagawa Kaku 2-3 B+R W+6.5

Demotion Playoff

The three players with 2 wins played a demotion playoff. Iwamoto Kaoru and Takagawa Kaku lost.

date black white result #mv sgf
1950-12-06,07 Takagawa Kaku Iwamoto Kaoru B+6.5 250 sgf
1951-03-05,06 Fujisawa Hosai Takagawa Kaku B+R 189 sgf

However, Fujisawa Hosai did not participate in the 7th Honinbo League.

Challenger Playoff

The three players with 3 wins played a challenger playoff won by Sakata Eio.

date black white result #mv sgf
1950-12-06,07 Sakata Eio Hasegawa Akira B+R
1950-12-13,14 Kitani Minoru Sakata Eio W+9.5 281 sgf
1950-12-20,21 Hasegawa Akira Kitani Minoru W+R 242 sgf

6th Honinbo Title

date black white result #mv sgf
1951-04-14,15 Sakata Eio Hashimoto Utaro B+R 199 sgf
1951-04-24,25 Hashimoto Utaro Sakata Eio B+4.5 240 sgf
1951-05-03,04 Sakata Eio Hashimoto Utaro B+2.5 309 sgf
1951-05-17,18 Hashimoto Utaro Sakata Eio W+R 136 sgf
1951-05-31,06-01 Sakata Eio Hashimoto Utaro W+10.5 273 sgf
1951-06-13,14 Hashimoto Utaro Sakata Eio B+10.5 256 sgf
1951-06-27,28 Hashimoto Utaro Sakata Eio B+3.5 262 sgf

Hashimoto Utaro won 4-3.