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An Ishida favourite
Whole-board planning: ladders
There is a clear idea here: if Black encloses with and White plays , Black can continue with the press at a, or (more likely for pros) with the taisha joseki at b. Black then is threatening to build a broad framework across the whole side. If Black does play the taisha, White by adopting one of the simplifying lines will only help Black’s strategy.
Therefore White’s approach at is seen as early as move 4 of the game. Black may still be aiming to play taisha at c.
GreenAsJade Why would black play given , when is intended to trigger the taisha, but White already has the ladder?
If White played in one of the other two corners, that wouldn’t be true. For example here means Black will be able to set up the ‘jabberwock’ plan of the first diagram, or to play a taisha with all ladders good after . This may not be provably bad for White, of course.
- Carrollian developments (originally based on material from this page).
- Crab’s Eyes (parallel 3-5 points).
Mostly there is no Japanese name for side formations – ‘Crab’s Eyes’ is one, but exceptional. Jabberwock is just something I made up (after the Lewis Carroll poem, about a scary hard-to-define monster and how to slay it ...)
This is a thoughtful and interesting page. --Hu of KGS
Quite brillig. -- Bill
My favorite! -- lovely
Also see my thoughts and variations on the double mokuhazushi fuseki? -- mafutrct
PJTraill: I cannot find those!
I looked through 100 pro games at eidogo featuring this opening (two 3-5 points), and when black plays it there is significant increase in winning ratio, maybe 4 to 1. Black did avoid taisha very often in the games I looked at. I used the opening for the first time this evening, and was very happy with both the result, and the ease of gameplay it gave me -- Pål
gaius: This opening is one of my favourites. I recently started to experiment with what I call the “slanty-ren-sei” fuseki:
Against an approach move at a, the press at b builds a nice center moyo. The approach move at c can be easily pincered at d (or taisha, maybe, depending on the whole-board position). I used to play at e instead of the middle hoshi point, but it feels a bit too far from the left and too close to the right. It looks so much nicer though :) What are your thoughts? It appears to be novel, as neither pattern gives hits on GoBase.
PYves: I like how well the 5-3 works with a side star-point (on either side of it), but it doesn’t feel efficient enough to be the first 3 moves. I would rather add a stone down a side first. I have tried changing the top left stone for the 3-3 point, which is more balanced, but possibly doesn’t work as well globally (though fun).