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Unusual Enclosures
Path: CentralLine · Prev: Floater · Next: TakemiyaKosumi There are perhaps nine normal corner enclosures in go. The number of unorthodox ones that are sometimes seen is large (as many as 50), depending on quite what one allows. See shimari for initial discussion. Suppose we interpret ABCD enclosure to mean the enclosure built from the A-B and C-D points in a corner. That means that 3453 enclosure is another name for the kogeima shimari, also known as the small knight's move enclosure. Correct Japanese would have this as kogeima-jimari, in fact; this phonetic change applies to the other enclosures too, but is less likely to be met in English-language texts.
Then the full list of usual enclosures, described in the same way, is
Of the less usual enclosures, the most popular are
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. Tight enclosures, aiming to take corner territory, are
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. There is one well-known enclosure made with three plays, the pillbox 355355. Often attributed to Hasegawa Akira, it was invented by Hashimoto Utaro. Before that the 3555 enclosure was usually completed at 6-3. In a 1969 game against Hashimoto Shoji, Takemiya made a 3573 enclosure. This he expanded with the 7-5 point:
Recently O Meien has tried experimental enclosures: the 3564 enclosure many times, but also 3563 (also played by Zhou Heyang), 3464, 3473. 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. Kato Masao has played 3474. 3465 was played by Suzuki Etsuo. Ma Xiaochun has played 4475 more than once. 3374 is perhaps mid-way between an enclosure and an extension. It has been played by Seo Pong-su. 3373 is a rare formation. 3584 has been played in recent times by Otake Hideo, 3594 in 1973 by Hashimoto Shoji. The 35103 enclosure, if you could call it that, is quite common, relatively speaking; as is the 3593 enclosure. The 3583 enclosure was tried by Kamimura Kunio. 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. The nineteenth century player Takasaki Tainosuke experimented with 3683 and 4674. The Chinese enclosure 3493 has of course been given a great deal of attention in relation with the Chinese fuseki and its variants. Path: CentralLine · Prev: Floater · Next: TakemiyaKosumi This is a copy of the living page "Unusual Enclosures" at Sensei's Library. (C) the Authors, published under the OpenContent License V1.0. |