parallel ladders
Difficulty: Beginner Keywords: Tesuji, Tactics
![[Diagram]](../../diagrams/20/5d447ec4ad319329b7a48f14f83b5f10.png) | Choosing a good ladder |
Here White has a choice of parallel ladders.
Because breaks just one of them, White must be careful. and are the correct way.[1] Now Black's stones can't escape.
![[Diagram]](../../diagrams/6/ffdffee4d2b38a7cfa43d3d01ba740ea.png) | Mistake |
here is a mistake, from the point of view of capturing Black.
![[Diagram]](../../diagrams/1/eb85ad881b11eb3bd369c6adc6d6f4af.png) | The ladder fails |
Later on in the ladder makes it impossible for White to continue.
Bearing driving in mind
![[Diagram]](../../diagrams/26/0f1b832a7a46ab1b0274efa374a63462.png) | Choosing a good ladder |
Moving closer along the diagonal does change things, White might then want to play , and here instead: a driving tesuji.[2] It all depends on the direction of play whether capturing Black on the left, or blighting on the right, is bigger.
Charles Matthews
[2]
![[Diagram]](../../diagrams/17/348412254fbfb2fa6fd8c921eb4a4335.png) | Choosing a good net |
Calling either ladder correct is questionable, when the net at also captures Black's stones. If Black tries to escape, say with , White can play atari. Note that the net works even if there is a black stone on the circled point.
-- Bill
![[Diagram]](../../diagrams/5/44876748ed4a2a34aebd9ae6899edc5f.png) | Netbuster |
Charles OK then, perhaps the final version of the lesson needs an extra stone, such as .
![[Diagram]](../../diagrams/20/e3daf90db0b3ca757ef1f52474033331.png) | Check the knight's move net |
It is painfully easy to miss a knight's move net like in a real game ( at a fails much more obviously). Up to Black looks to be well set to escape.
![[Diagram]](../../diagrams/49/8ca343a465b9136450c276002b23fe94.png) | Check the knight's move net (continuation) |
Urgh - the paper is too small to contain the rest of the sequence ... Black at a is about to be strong.
A better version of the original diagram would therefore deprive of further liberties.
This is a copy of the living page
"parallel ladders" at
Sensei's Library.
2004 the Authors, published under the OpenContent License V1.0.
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