Standard opening 1

   
[Diagram]

Standard opening

The following is a standard opening. It has been thoroughly investigated by Cho Hun Hyun and Lee Chang Ho and often occurs in Korean pro games of the '90s. We start with four corner star points.

[Diagram]

Standard opening

Up until B3, this is a local joseki of the bottom left. Now White faces the decision where to move next. W4 is considered whole board joseki[1] after which Black patches up the weakness at a. W6 is considered mandatory, because a black move there would be sente for the threat at a). Black continues utilizing his thickness to play on the left and apply pressure on White's corner. W8 is a standard diagonal haengma to prevent being enclosed by a double keima. (Dieter ignores the exact reason for W10).

[Diagram]

Standard opening

White must respond at W2 according to whole board joseki [2]. At W8, the standard opening comes to an end, that is to say, professional players believe that no further research is paying off and this has found its way into standard (Korean) textbooks.


[1]

[Diagram]

Variation 1

This W1 gives quite a bit of cash? at the bottom left. However, after B6, Black takes a global lead, or rather, the position is considered active? for Black. So, W1 is called a whole board joseki mistake.


[2]

[Diagram]

Variation 2

White would like to resist Black's speedy play by punishing him for leaving the marked stone unattended, but Black sacrifices the stone and takes sente to play B2 in the next diagram. This is again called active for Black. Hence W1 is a whole board joseki mistake.

[Diagram]

Variation 2 continued


This is a copy of the living page "Standard opening 1" at Sensei's Library.
(OC) 2008 the Authors, published under the OpenContent License V1.0.
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