Shoulder invasion of mixed three space extension
Please elaborate.
Charles I'm having trouble finding examples for this. Next Black at a: what has White achieved?
Forces the ladder ? I opened these pages following a comment I have read somewhere about the v-shape of the recommended invasion points. --Dieter
- Alex Weldon: What you're thinking of is Attack and Defense - the book by Davies and Ishida, where they suggest contact on the higher stone, shoulder hit on the lower stone or low invasion as the ways to invade this formation.
- Charles You can see the first of those at attachment invasion of mixed three space extension. The shoulderhit move is there labelled a reduction play (too). On the whole it is better that SL doesn't copy books - even good ones such as Attack and Defense - the book .
HolIgor: What ladder?
connects
The result may be not bad for white, but I don't see a ladder.
If white is strong on the right side then this is not a natural point to invade. If black is strong there white is under attack yet.
tapir: Not that I would advocate it, but what would happen now? How do all this change if white has a stone on the right side somewhere?
Andy: White can also look at
as a forcing exchange and turn elsewhere. Of course, this hurts white's prospects of invading, so black should be strong to begin with here, otherwise white might prefer a more aggressive
like a.