I did remove the comb formation and walkie-talkie eight from the Common Corner Shapes page.

(as i did all closed shapes with more than 8 spaces.)

Do you really find the others uncommon as well? (they are chapters in Davies "life and death")

If you really think so you may remove them from the Common Corner Shapes page.

But please do leave the Corner Shapes page as a full index. (It is a bit a child of me, I started this page about a year ago)

You are all welcome to edit sensei's library but just removing shapes from the full index is not helpful for anybody.

Sorry but I am starting to think that i am waisting my time here a bid.
Was hoping that somebody would find a bigger closed group that also could revert to s seki.
But all i get is handwaving. So i think i am going to do something more usefull. like editing the Five stones on the third line in the corner page

And you all may wonder if it is a commmon or an uncommon corner shape.

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Promotor and Librarian of Sensei's Library

No, I do not.

I have been arguing, for quite some time now, that the corner shapes pages should include only common corner shapes. You gave an entirely different list of criteria, which included "no cutting points". If you think that "no cutting points" is a reasonable criterion for the corner shapes page, then apparently you feel that all of those common shapes with cutting points should be removed. If you don't think it is a reasonable criterion, then why did you give it?

It is that i just finished a big edit of five stones on the third line in the corner.
Hope that the page is a bit more useful now.

Okay you may have 1 cutting point per shape.

But:

- the stone or connected stones at each side of the cutting point have at least 3 liberties. (so cutting doesn't put them in atari and the cutting stone can be put in atari)


Guess you now also want open formations

- Okay but the gap between the nearest black stone and the side is at most 1 space.

(I know tha gap with five stones on the third line in the corner is two stones but that is the only one. (and follows from the name of the shape)

But can i now have 20 diagrams? (is still less than 10% of all those positions

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Promotor and Librarian of Sensei's Library

Wow, it's a good thing we have an official "corner shape" judge here, letting all of us uneducated plebes know the criteria for what constitutes a corner shape. And here I was, thinking that a corner shape was any shape that occurred in the corner. Boy was I wrong! Good thing I've been schooled before making a fool of myself at a sophisticated cocktail party.

willemien, I think you are missing the point

if we were studying knots, for example, there are some very basic and important knots to learn



but there are also knots that are nothing more than an interesting puzzle



the corner page was very helpful and useful when it contained, what is considered, very basic and important corner shapes to learn. but some of the shapes you are adding now are not considered basic and important shapes to learn. they are nothing more than perhaps interesting puzzles -- that just happen to be of some "shape" in the corner.

You forgot one:

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Help make L19 more organized. Make an index: https://lifein19x19.com/viewtopic.php?f=14&t=5207

I did some checking but could not find any corner shapes where:



so I wrote something for this on the Corner shapes page.

There is now also a Common Corner shapes page that only contains the more commen one . (although i a wondering should the rectangual six and eight shapes be on this page.)

And as with knots you sometimes need a lasso. (that knot was not on your list)

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Promotor and Librarian of Sensei's Library