Shapes related to the carpenter's square
Keywords: Life & Death
| Table of contents |
Shape 1
No outside liberties
is a mistake. The result is one eye to none, Black cannot approach and loses the capturing race.
cannot kill, the result is a seki. The reader may verify that
at a does not work either.
With outside liberties
Shape 2
No outside liberties
If
makes an eye here, then
is atari, which allows White to destroy the eye at the corner.
With outside liberties
With outside liberties, White can still get a ko. (same as Gokyo Shumyo, Section 3, Problem 78).
clamping at the 1-2 point is the tesuji that allows White to kill by a ko. If
at a, the
at b is also a ko.
Shape 3
With an open side
Carpenter's Square with an extra leg
See also:
![[Diagram]](../../diagrams/37/ea9e3021b1baa1fa16cbe12ac8043e82.png)
![[Diagram]](../../diagrams/41/adeb64dd784c4d4f620cb57354270029.png)
![[Diagram]](../../diagrams/46/35b7c032146d288fd07adcebd6ab78be.png)
![[Diagram]](../../diagrams/18/3464b7eb4765eb481b335d61226e88f1.png)
![[Diagram]](../../diagrams/47/e4362ac33542085354d7c9d48e7e0218.png)
is wrong. After
and ![[Diagram]](../../diagrams/27/925bc11e28dc201f94cfd16dd27bfc6e.png)
![[Diagram]](../../diagrams/8/9fb77501ecf2834ffa5b705c0407c716.png)
![[Diagram]](../../diagrams/15/f7f3073b65b0a281173d22cdafc75a88.png)
![[Diagram]](../../diagrams/8/9ae70a8d543fb316633913be761b789a.png)
![[Diagram]](../../diagrams/1/c32cb3ed74c5b6bdc23d7b82464f4567.png)
and ![[Diagram]](../../diagrams/31/6033cf212221193a1863d14675bb5baf.png)
![[Diagram]](../../diagrams/12/e1d3dbf20f62c7d311a907639ccb178c.png)
![[Diagram]](../../diagrams/46/132e280a1fddd1e29e2ce5cd4e648edd.png)
![[Diagram]](../../diagrams/3/fdf34f0a898a07ff2590eca1e6179629.png)
![[Diagram]](../../diagrams/28/8480f573e9ae28fe361ec5c560f92e4f.png)
![[Diagram]](../../diagrams/24/3ae969f932566a239226fee9bdbece82.png)
![[Diagram]](../../diagrams/41/335a117b0d88d30b22fe4ca45cda6d77.png)
![[Diagram]](../../diagrams/31/6a11a5f4d7753ed8df2b2ac927fc78e2.png)
![[Diagram]](../../diagrams/47/38d2c38180b407d21a756a4f7bb032fd.png)
2024 the Authors,
published under the ![Sensei's Library [Welcome to Sensei's Library!]](../../images/stone-hello.png)