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InvasionItinerary

Referenced by
44Point33Invasion...
44PointVeryLowApp...
DieterSIdeasOnGoT...
44PointJosekis
DieterSListOfTrus...

 

Block on the Wider Side
Path: GoProverbs   · Prev: ApproachFromTheWiderSide   · Next: PlayAtTheCentreOfThreeStones
Path: InvasionItinerary   · Prev: 44Point33InvasionJoseki   · Next: 44Point33InvasionJosekiHaneInsideCut

  Difficulty: Advanced   Keywords: Opening, Joseki, Proverb

[Diagram]
The 3-3 point invasion

This Go proverb is meant for the situation in this diagram: White has just invaded at the 3-3 point below Black's 4-4 point (see 3-3 Point Invasion). On which side should Black block, at a or at b? The general rule is to block where your extension is wider or the potential moyo is larger.


[Diagram]
An example

In this diagram BC is further away than BS (so it is the wider extension), so Black blocks at B2 rather than a.


[Diagram]
A second example

Here BC and BS are at the same distance, but if one looks beyond it, the upper moyo still extends further than the left one, so again B2 is the correct move.



Emptyriver- Sorry, but could you explain this a little more. It seems like Black will want to protect the weaker side (the territory on the left side seems less secure) from White's influence.

Jasonred If I'm not mistaken, the joseki does protect the weaker side. Anyhow, influence? what influence? This usually leads to White gaining some territory, and Black gaining influence, no? Of course, this is only joseki at kyu level, but good enough, I guess. Even at kyu level, I wouldn't want to be White in this sequence, as the board was just too open to trade off the territory from san-san invasion for that wall!

[Diagram]
Second example played out




Path: GoProverbs   · Prev: ApproachFromTheWiderSide   · Next: PlayAtTheCentreOfThreeStones
Path: InvasionItinerary   · Prev: 44Point33InvasionJoseki   · Next: 44Point33InvasionJosekiHaneInsideCut

This is a copy of the living page "Block on the Wider Side" at Sensei's Library.
(OC) 2003 the Authors, published under the OpenContent License V1.0.