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Questions tagged [invasion]

A Go term for playing inside another player's moyo with the intention of living or escaping.

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18
votes
2answers
2k views

Why is this corner enclosure considered to be safe against 3-3 invasion?

I have read somewhere, but unfortunately forgot where that the following enclosure is safe against the invasion at a. $$ White invades at 'a' and supposedly dies. $$ --------- $$ -........ $$ -..........
14
votes
4answers
2k views

Second line invasion of two-space extension

The two-space extension is a very common pattern and forms a base. I've found lots of material here, and here, and elsewhere on how it cannot be cut and how to defend against various invasions. ...
8
votes
5answers
716 views

How do I chose invasion or reduction points?

I have the following board: $$cm1 $$ +---------------------------------------+ $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . O . . . . . . . . . . | $$ | . . . . . . . O O . X . . ...
2
votes
2answers
258 views

Does the 3-3 invasion work with 3 stones already placed?

With the three black stones placed, I did the 3-3 invasion. $$Wm1 $$ ---------- $$ ........| $$ ...X....| $$ ...X.1..| $$ ....X...| $$ ........| I tried tried to force a KO and did get 2 moves ...
1
vote
2answers
214 views

3-3 invasion into 4-4,6-4

In josekipedia, they state that this exchange is a mistake See http://www.josekipedia.com/#path:pdttpfqcpcqdqepbobrbpaqaqb for the full sequence they argue with. But, I think that their argument is ...