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Roberts vs Casey
    Keywords: Ongoing game

Black: M.Roberts 23kyu White: J. Casey 15kyu Commented by: Klaus, 1kyu 6.5 Komi

[Diagram]
Moves 1-5


Klaus: Let's start here: what are the alternatives for B5?

[Diagram]
Option 1: safe play

 Black can play safe, and hope to overcome the komi with beginning the yose.

This offers a fair chance for both sides.


[Diagram]
Option 2: invading

Both players have a mixed, three-space extension, so it is natural to invade at once. a and b are possible invading points.

See Low invasion of mixed three space extension and Attachment invasion of mixed three space extension for reference. Of course things are a little different here...


[Diagram]
May be confusing...

I have no clue what is going on here. Let's call it a fight. My sequence might be completely off the mark. Black is trying to persuade white to capture stone, using to many moves...


[Diagram]
May be confusing too...

Again, the sequence is just a guess but B1 and B3 will be in trouble if white finds time to split at b


So what about the game continuation?

[Diagram]
Moves 1-5

--- B5 threatens a splitting attack at a but compared to a move at b it leaves two weaknesses at x. Black seems to have a shape problem: I would generally prefer the set of shape 1 b) and 2 b) over 1 a) and 2 a)


[Diagram]
Shape 1 a)

[Diagram]
Shape 2 a)

[Diagram]
Shape 1 b)

[Diagram]
Shape 1 b)


Having said all that, How should white answer B5?

[Diagram]
Suggested W6

I think, he can simply answer at W6, seeing B5 as a thank you move: white is safe from any invasion now, whereas black still has two weak spots at x and y


Next moves at Roberts vs Casey 6-13



This is a copy of the living page "Roberts vs Casey" at Sensei's Library.
(OC) 2004 the Authors, published under the OpenContent License V1.0.