Carrollian developments

5-4 point plus small high enclosure  

For example, here all Black's stones, and and the stones. are working together on a large scale. Presumably first explored by Katayama Chiteki.

Although there are indeed not so many examples in pro games to study, there are some. These form interesting material from the point of view of framework theory. For instance, they often include use of a wedge on the side, and tenuki joseki.

Since in the diagram fits in with many amateurs' ideas on the use of influence, these are instructive patterns to study. Of course one should also look at the whole board. Often Black in playing this way is applying an ippoji strategy: omoyo play may cause panic in some opponents, but that doesn't mean it's sound. Therefore a technical discussion of how to play these sides is called-for. If White has some basic ideas on strategy here, it will be a great help.

5-3 point plus small low enclosure  

Here White's basic ideas are at a or at b. The former allows Black to start the taisha joseki: this is a signature pattern of Ishida Yoshio. If White b, Black a for a complex of joseki that give Black a large corner: but the game will stay relatively simple. (The wedge White at c was played by Segoe in an old game.)

5-3 point plus small high enclosure  

The options are the previous main choices with expected outcomes as before: plus White at c, in the corner. This was played in a game 2002-10-28 between Kubo Katsuaki and Yuki Satoshi (B); Black played the cover at b and an early struggle for a good ladder ensued, in relation to the lower right corner.

5-3 point plus large low enclosure  

This was played in a game Kobayashi Koichi-Otake Hideo (B) 1993-11-24. White came in at a and Black played the cover at b.

5-3 point plus large high enclosure  

This pattern has been played by Miyazaki Shimako. When White played a she played the taisha, and against White at b the contact play c (attach-extend).

5-3 point plus 3555 enclosure  

This pattern was played by Yamashita Keigo in 2000. White has played at a, and at b (to which he answered by taking the 3-3 point). Cho Hun-hyeon played at c.

See also strange opening from a pro game: a comparable position reached in a game Yi Ch'ang-ho (B)-Paek Tae-hyeon 2001-05-30, though with a 3564 enclosure. White allowed Black a second enclosure.

White can of course avoid immediate difficulties by agreeing to a ryojimari game.

5-3 point plus 3564 enclosure  

This is from an Ishida magazine article. If Black is happy playing a 3564 enclosure the same type of formation can be set up from the (unorthodox) starting position.

5-3 point plus 3363 enclosure  

This was played (colours reversed) in a game 1982-06-29 Shao Zhenzhong-Kanda Ei (B). The stone had been played to limit influence in the lower right. Therefore isn't so surprising, to slow the game down.

5-4 point plus small low enclosure  

There are examples here of top players as White coming in at a or at b.

5-4 point plus small low enclosure  

From the young Cho Chikun as insei, playing Kasai Koji (B) 1968-01-26. White combines a tenuki from the left corner and a wedge with .

5-4 point plus small low enclosure  

Kobayashi Koichi-Awaji Shuzo (B) 1989-10-18. White plays to live quickly wth ; and then limits Black's framework with .

5-4 point plus small high enclosure  

In this case the patterns are much the same for White coming in at a or b.

5-4 point plus small high enclosure  

This is from a game Hori Kentaro-Takagawa Kaku (B) 1934-09-16. White concentrates on getting a live group: there is aji in both of Black's corners, so this is a classic plan.

5-4 point plus large low enclosure  

From Murase Shuho-Kuroda Shunsetsu 1879-06-25: another tenuki+wedge pattern.

5-4 point plus large high enclosure  

From a WAGC qualifier January 1982 Yang Jinhua-Cheng Xiaoliu: wedged immediately. The correct wedge point is apparently 10-3 if played at once, 11-3 if White starts in the left-hand corner and plays tenuki.

5-4 point plus 3554 enclosure  

This, with colours reversed, is from Takagi Shoichi-Kudo Norio (B) 2000-09-21. The game continued Black a, White b, Black c, White d. This fourth-line short extension occurs also at 5-5 point.

5-4 point plus 3555 enclosure  

This formation has been used by Yamashita Keigo: leading to and . After White invades (at a or b) Black allowed White to connect to , building a wall on the left side.

There is an older example at perverse wedges

5-4 point plus 3564 enclosure  

In a game Cho Hun-hyeon-Yi Ch'ang-ho (B) 1995-09-27 it went this way: in later fighting moving leftwards White put to use.

5-4 point plus 3564 enclosure  

A game Yang Sang-kuk-Cho Hun-hyeon (B) from 1975 went a more conventional way, to begin with. White played tenuki after , permitting a black attack at .

5-4 point plus 3563 enclosure  

From Wang Lei Sr.-Qiu Jihong (B) 1996-05-09. White plays straight for the vital point of the 3563 enclosure, and succeeds in settling a group with , and White 11 at a (immediate life).

6-3 point plus large low enclosure  

This is from Taiwan: Chen Yongan-Zhou Junxun (B) 1995-02-12. White plays into a double kakari; and then lightly out again.

What follows was previously on the jabberwocks page.

4-6 plays  

In this case the wedge 2 is useful for White, because Black then has two insecure corners. This is a good illustration of miai thinking.^[2]

Charles Matthews

"5-4 Sanrensei"  

This was played by Go Seigen against Kitani Minoru in a three-game match sponsored by the Jiji Shinpo. Waltheri doesn't have the date, but from the ranks of the players I've deduced that this game was played in 1933 or 1934. Kitani won by a convincing margin of seven points.

It cropped up again in 1968, played by Kikuchi Yasuro against Yasunaga Hajime. Yasunaga won by resignation. As we can see, there's apparently yet to be a professional win with this formation.

"Triple 5-4s"  

This combination appears only a couple of times in Waltheri.

The first appearance was in 1935, played by Takagawa Kaku against Isogawa Masao. The second appearance was in 2000, played by Mok Jinseok against Weon Seongjin.

"Cosmic Orthodox"  

This formation appears in 14 reliable games in Waltheri. Its most notable outings:

• Shinohara Masami played it against Go Seigen at some point in 1934-36
• Maeda Nobuaki played it against Go Seigen in 1935
• Takagawa Kaku played it against Fujisawa Kuranosuke in 1937
• Hashimoto Utaro played it against Cho Chikun in 1977

It last appeared in 2016, played by Kunisawa Hiroto against Nakano Yasuhiro.

"Yamashita's Opening"  

This side setup appears in 11 games. In five of them, it's played by Yamashita Keigo. Its most notable outings:

• Onoda Chiyotaro played it against Hashimoto Utaro in 1935
• Yamashita Keigo played it against Takemiya Masaki in 2000
• Yamashita Keigo played it with tengen against Hane Naoki, date unavailable