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
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.
Kato Masao has played 3474.
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.
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.
The 45103 enclosure had an outing in eighteenth century go.
- unusual enclosures and tenuki variations
- unusual three-stone enclosures
- 4-4 point enclosures
- 3-4 point enclosures
Sometimes a player stakes out a bigger corner with an irregular shimari.
Usually it is not so good to enter at San-San:
Bill: How about this?
MDH Here is a different one that I played against recently. White ended with seki in the corner.
How do you handle it?.
Bob McGuigan: Yi Chang Ho has played this pattern. There are a few games on GoBase. It seems White doesn't invade the corner immediately, but waits to see how things develop on the left and top sides. A common followup play for Black is at a. Even after this there is still aji for a White play at the star point.