BQM 306

    Keywords: Question

Herman Hiddema: In a discussion game of a group of players (including 3d and 4d players) against a 5d player who held the white stones, the following position occurred

Setup joseki  

Herman Hiddema: After the pincer with white+circle, black chose the joseki starting with B1.

Deviation from joseki at W2  

Herman Hiddema: After the joseki move of B1, the normal move would be for white to play a (followed by black b and white c), but White played W2 instead. Does anyone know if and how black can punish this move?

Deviation from joseki (continued)  

Herman Hiddema: In the game the group voted to cut at a, which resulted in this diagram. I think this is a one-way street, no deviations are possible, but please correct me if I'm wrong. I didn't like this result. Exchanging B5 for W6 is painful, and the fact that W8 is sente is also painful. Also white has a good sente endgame move at a left.

Bill: By the end of this variation, the exchange, B1 - W2, doesn't look so good. Maybe better to skip it.

Dieter's var  

Dieter: I think after black+circle-white+circle, Black can strenghten the cut in sente (there is a ladder), then proceed as in the previous diagram. While there the cutting stone could be captured in a net, here the two stones have much more potential. Yes, a is sente, but b is a shape ruining move for Black to keep in reserve.

Velobici's musings  

Velobici: Taking a whole board view, rather than thinking in terms of punishing a deviation from joseki, the following thoughts occur. Black has gained about 20 points of territory in the upper left. While being sealed off from the top, Black still has access to the left side at a. White's shimari in the lower left places emphasis on the left, yet Black can consider playing at b and connecting back to the upper left at a or extending to c depending upon White's reaction. The White wall faces two black stones on the fourth line which limit the wall's usefulness. B1 can be regarded as light, perhaps using threats of connecting it outward to limit further any white gains from her wall. Is the whole board position bad for Black ? I wonder if White has not punished herself in selecting this joseki. Play on the left can be regarded as miai with play on the top at e or f.

Simple response  

Bill: What about the simple response, B2, which threatens B3? This is like the joseki, except for the exchange of W1 - B2. (If at some point W7, Black can reply with B8.)


Bill: Compare that with joseki, where White has the kikashi, W1 - B4.

Simple response (2)  

Bill: Hmmm. Maybe B4 is the play. One point being that Black can answer Wa with Bb. B6 prevents W6, which would be sente, I believe. (Black does not make this play in the joseki, because White still has the kikashi on the left side.)

Simple response (3)  

Bill: If W3, then maybe B4, and now if W5, a la joseki, B6 is a possible attack, given the cutting points (a).

BQM 306 last edited by Dieter on July 5, 2008 - 12:48
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