Tsumego From Games 41 / Attempts

This page uses an experimental move navigating system. How to deal with it?

First, click at "Start" in order to position the initial diagram correctly.
Then, just click at any of the red-shadowed variant move points, and you'll feel like placing a stone there. You don't need to scoll at any time unless you want to see this text again.
To go back to the previous diagram, choose "Back" (near the upper left corner of the current diagram).

Please see /Discussion for a discussion of the system.

First, here comes the original situation again, but shown as whole board.Thanks. Just click at the link markers to go to the corresponding solution attempts.

(When adding a variation, please place it in the appropriate section and/or create a new link marker, respectively.)

Back [1]

Back 1.1

Back 1.1.1

jfc: white 1 through 7 are sente here and buy white a few extra liberties at b as black must capture the white stones before playing a. After this c seems natural for white. I've played a few variations from here to conclusion and it seems like white wins.

Back 1.1.1.1.1.1.1.1.1.1.1

jfc: one continuation for white. This looks promising to me ...

Back 1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1

Back 1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1

--(end of branch)--

Back 1.1.2

Charles Have tesuji gone out of style on SL?

This looks like an interesting way for White to gain some time in the corner?

Back 1.1.2.1.1.1.1.1

Chris Hayashida: I didn't understand the result of Charles's diagram. I found something similar (in "Tesuji", oddly enough) so I added the continuation. This sets up a multi-stage ko in the corner. Is this the correct continuation?

Charles That is one of two possible kos that should be looked at here. White has several possible local threats. It's a deceptive position, I think. White might get a poor result by playing a threat at the circle point, and a better one by playing at the square point.

--(end of branch)--

Back 1.2

Bill: I think that the surroundings are relevant. For instance,

Suppose that lives in exchange for the corner. How to assess this variation depends upon the aji of white+circle and the possible attack against the white+square stones.

If the Black group in the top left corner lives, Black can attack White's group on the top side.

--(end of branch)--

Back [2]

Dave: In this type of position I think the first question is whether White can play in sente. This destroys Black's eye shape. After this if White turns to the corner, Black does not have the option of playing at 1 and living on the upper edge.

Back 2.1.1.1

Dave: Descending at reduces the corner aji and threatens to connect. However, the hane at looks effective. If then after Black can not play both a and b at the same time.

--(end of branch)--

Back 2.1.1.2

Dave: So Black switches to this , . Can White create enough liberties in the corner to win the fight? The aji of the two White stones looks effective.

Back 2.1.1.2.1.1.1.1.1.1

Back 2.1.1.2.1.1.1.1.1.1.1.1

Back 2.1.1.2.1.1.1.1.1.1.1.1.1.1.1

Dave: White wins the capturing race.

--(end of branch)--

Back 2.1.1.2.1.1.1.1.1.1.1.1.1.1.2

Bill: Instead of White at a in the previous diagram, threatens to kill the black+circle stones or to escape to the center.

Back 2.1.1.2.1.1.1.1.1.1.1.1.1.1.2.1

Bill: Next, captures the black+circle stones.

--(end of branch)--

Back 2.1.1.2.1.1.1.1.1.1.1.1.1.1.2.2

Bill: saves the black+circle stones, but White's escape is successful. If B a instead of , W10 captures because of the ladder.

--(followup at c)--

Back 2.1.1.2.1.1.1.1.1.1.1.1.1.1.2.2.1.1.1.1.1.1.1.1.1.1

Bill: The white+circle stones still have aji. White can aim at - , for instance.

--(end of branch)--

Back 2.1.1.2.1.1.1.1.1.1.1.1.1.1.3

Bill: Perhaps White can simply play this way, as well.

--(end of branch)--

Back 2.1.1.2.1.1.1.1.1.1.1.2

Back 2.1.1.2.1.1.1.1.1.1.1.2.1.1

Dave: White wins this case as well.

--(end of branch)--

Back 2.1.1.2.1.1.1.1.1.1.1.2.1.2

Dave: Black can start a ko here. Black's only local threat is .

--(continuation at 1)--

Back 2.1.1.2.1.1.1.1.1.1.1.2.1.2.1.1.1.1

Dave: If a White play at 7 is not a ko threat then the situation depends on external threats. If Black has a large enough external threat then White has a problem. However, if Black has no large outside threats then White can play here.

--(end of branch)--

Back 2.1.1.2.1.1.1.1.1.2

Bill: Instead of White at a in the previous diagram, can simply make life, killing Black's group. Then if Black at , White at kills the corner.

--(end of branch)--

Back [3]

Kosh: How about this? So probably B will let W live so he can live himself.

--(end of branch)--

[1001]

Bill: Thanks for showing the whole board. :-)

Path: <= Tsumego From Games =>

Tsumego From Games 41 / Attempts last edited by Unkx80 on September 10, 2004 - 22:27

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