Life In 19x19

Have I read this correctly? The only way for black to capture is to play at 1. If white plays in the corner, black gets captured but can then play at 1 again and white cannot create two eyes. W will run out of liberties before black, so black gets the whole W group. Yay or Nay?

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[go]$$B Corner
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$$ | X X X X X X . . .
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I wouldn't call it a sacrifice, but yeah.

illluck wrote:I wouldn't call it a sacrifice, but yeah.

Is there a Go term for this? Giving up a stone or two to capture a larger group?

Yes, like we discussed having your stones die in a killable eye shape is a key way of killing groups.

Boidhre wrote:Yes, like we discussed having your stones die in a killable eye shape is a key way of killing groups.

well, I remember looking at that problem before our game, and I remember skipping it. Last night I looked at it and it kinda worked itself out, so thanks are in order!

http://senseis.xmp.net/?Nakade is perhaps a term that may be used, though I usually don't really use a specific term but just say that "1 here kills".

I generally use sacrifice as a macro/strategic concept. A similar tactical idea to allow the opponent to capture in order to remove eyes is http://senseis.xmp.net/?ThrowIn

It's not a sacrifice because white won't (shouldn't) capture, except as a ko threat.

palapiku wrote:It's not a sacrifice because white won't (shouldn't) capture, except as a ko threat.

So white could just let it sit and be captured? Would capturing the (black) stones help at all when counting in the end?

Xaos wrote:

illluck wrote:I wouldn't call it a sacrifice, but yeah.

Is there a Go term for this? Giving up a stone or two to capture a larger group?

Making a play inside an eye to prevent a second eye is called an inside play. AKA nakade.

Bill Spight wrote:

Xaos wrote:

illluck wrote:I wouldn't call it a sacrifice, but yeah.

Is there a Go term for this? Giving up a stone or two to capture a larger group?

Making a play inside an eye to prevent a second eye is called an inside play. AKA nakade.

Thanks Bill! (and others)

Yes, like others have said, sacrifice is mostly used for a situation where there is some kind of trade: I give up a few stones and my opponent gains something from it, but I get something in return.

Here, Black loses nothing.