This page uses an experimental move navigating system. How to deal with it?
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.)
Black to continue. - Back
White to move.Back
Diagram 1. - Back
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.
Diagram 2 - Back
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
Diagram 3 - Back
Back
1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1
Diagram 4 - Back
--(end of branch)--
Tesuji cut. - Back
Charles Have tesuji gone out of style on SL?
This looks like an interesting way for White to gain some time in the corner?
Tesuji continuation. - Back
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)--
Furikawari - Back
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
and the possible attack against the
stones.
If the Black group in the top left corner lives, Black can attack White's group on the top side.
--(end of branch)--
Can White take Black's eyes first? - Back
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.
Black descent, White hane - Back
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)--
Black descent, White hane (2) - Back
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.
Black descent, White hane (2) - Back
Black descent, White hane (2a) - Back
Back
2.1.1.2.1.1.1.1.1.1.1.1.1.1.1
Capturing Race - Back
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
Escape to the center (1) - Back
Bill: Instead of White at a in the previous diagram, threatens to kill the
stones or to escape to the center.
Back
2.1.1.2.1.1.1.1.1.1.1.1.1.1.2.1
Escape to the center (1) - Back
Bill: Next, captures the
stones.
--(end of branch)--
Back
2.1.1.2.1.1.1.1.1.1.1.1.1.1.2.2
Escape, var. 1 - Back
Bill: saves the
stones, but White's escape is successful. If B a instead of
,
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
Aji - Back
Bill: The 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
Escape, var. 2 - Back
Bill: Perhaps White can simply play this way, as well.
--(end of branch)--
Black descent, White hane (2b) - Back
Back
2.1.1.2.1.1.1.1.1.1.1.2.1.1
Black descent, White hane (2b) - Back
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
Ko (1) - Back
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
Ko (2) - B5 elsewhere - Back
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)--
Simple life - Back
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)--
A possible sequence following 1 - Back
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. :-)