Unusual enclosures
Catalogue
There is an SL list of the nine standard enclosures. It uses an enclosure notation, which is unpopular from the point of view of discursive discussion (just as Linnaean names in biology are conversation-stoppers). See discussion now being moved to enclosure nomenclature.
Of the less usual enclosures, the most popular are
- 3464 enclosure, called niken-jimari, two-point enclosure, large high enclosure
- 3554 enclosure, which has a long history.
Almost all unusual enclosures are centrally-oriented, because they are weak in the corner. The enclosures based on 4-4 points are influence-oriented, except the 4463 enclosure for which the 3-3 invasion lives only in ko (normally).
Tight enclosures, aiming to take corner territory, are
- 3353 enclosure and 3363 enclosure
- 3443 enclosure ('Doesn't lose points but very bad' Ishida Yoshio)
- 3437 enclosure, as played for example by Fujisawa Hideyuki
- 4433 enclosure, 4434 enclosure, 4435 enclosure preventing the 3-3 invasion behind the 4-4 point
- 4442 and 4452, not supported by other stones, are very special techniques.
The other classical enclosure is
The 3445 and 3446 enclosures are typical special techniques in the Chinese fuseki and mini-chinese, for positions in which 3454 wouldn't be ambitious enough.
Notes on less usual enclosures
(some of these are actually extensions, rather than corner enclosures with the intention of protecting the corner)
3373 is a rare formation.
3374 is perhaps mid-way between an enclosure and an extension. It has been played by Seo Pong-su.
3464 is an O Meien experiment.
3465 was played by Suzuki Etsuo.
The 3473 enclosure is actually a move with a long history - Dosaku played it - normally played for reasons of fighting or balance on the side. O Meien has tried it.
Kato Masao has played 3474.
3483, played free-standing rather than in a kind of Chinese formation, is in fashion in 2002 with Yang Yi and Wang Lei Sr..
Yi Ch'ang-ho has tried the 3553 enclosure more than once.
The 3563 enclosure has been played by O Meien and also played by Zhou Heyang.
Recently O Meien has used the 3564 enclosure many times.
The 3583 enclosure was tried by Kamimura Kunio.
The Chinese enclosure 3493 has of course been given a great deal of attention in relation with the Chinese fuseki and its variants.
3584 has been played in recent times by Otake Hideo.
3594 was played in 1973 by Hashimoto Shoji.
The 35103 enclosure, if you could call it that, is quite common, relatively speaking; as is the 3593 enclosure.
Discussion of the 35113 enclosure at 3-5 point distant low approach.
Yang Keon has played 3663.
The nineteenth century player Takasaki Tainosuke experimented with 3683 and 4674.
Ma Xiaochun has played 4475 more than once.
Kamimura Kunio once played 4565. 4554 was an experiment of Yu Bin. 4573 was played by Ishida Yoshio in the Nihon Ki-in Championship match 1971.
The 45103 enclosure had an outing in eighteenth century go.
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