Tower peep
The tower peep or tower poking move is so called because the shape resembles a tower if seen from bottom right to top left. is a peep at both Black's connections. It can also be called a double peep (ryo-nozoki; 両ノゾキ), as it is in Japanese.
kokiri: by an amazing coincidence, I opened a copy of sakata eio's Tesuji and Anti-Suji of Go last night at the club and it opened at a page on the tower peep, so there is one fairly old source of the name.
Bill: I checked the Japanese paperback, and there (p. 117) it is called Yagura nozoki. Turret is a possible translation for yagura.
John F. A yagura is literally an arrow storehouse, and most commonly refers to sumiyagura, the turrets at the corners of Japanese castle. So I'd guess that the real idea here is peeping FROM the turrent from the inside through the small window slits made for shooting projectiles, which I'm sure have have a technical name but I don't know it[1]. In go yagura usually refers to the shape of four stones in a square formed by ikken tobis. It's famous as a shogi castle, too, of course.
Bob Myers: That's very interesting. It seems to me we should call this the turret peep, then.
On a completely unrelated note, the Japanese town of Kamakura is surrounded by mountains made of a soft stone into which prehistoric inhabitants carved hundreds of caves where they lived; later, they were used widely as graves. These caves are also called yagura, although that usage apparently is strictly limited to Kamakura.
In the previous diagram, Black can take countermeasures against the peep. These countermeasures completely fail however, when White has in place. Therefore, ...
Jesse: I don't understand this. On the linked page, White does have
in place, but has not peeped yet. This page makes it sound like it's about a way to resist after the peep has been played.
is considered correct shape. Playing at a instead increases the aji and reduces the severity of the tower peep.
This pattern, which curiously enough produces two empty triangles, appears in a few pro games. I'd appreciate comments from stronger players on this type of exchange. Calvin
Reuven - In a slightly messier environment, when I needed to stay "connected", this came in handy..
[1] Robert Pauli: arrow slit is a plain one.
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