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4-4 point 3-3 invasion joseki, hane inside cut
Path: InvasionItinerary · Prev: BlockOnTheWiderSide · Next: 4463Enclosure33Invasion
Difficulty: Expert
Keywords: Joseki
What is the purpose of
I guess I've seen this one before. I think he's trying to trick White into DJ: Not only that, a and b are Sente for Black. I have created a page for this move as played by top pro's. See below for a reference.
So I think White has to resist with
This is a line of play that comes to mind. Depends on the ladder at a, but Black can sacrifice the marked stones, can't he ? Fairly complicated ...
Interesting variation, Dieter. I think that if the ladder works for White, this is good enough for her. If Black is going to sacrifice the stones, he'd better not play at
But what can White do if the ladder does not work for her? The variation shown by Dieter is clearly bad for her in that case. My first intuition was to play at I do however get the impression that this is good for Black: because the three white stones have only two liberties, White b is not sente, and White will have to play one of the circled points to use the aji of these stones. I do not however see any other good options for White either, so when the ladder works for Black, only the 'Tricked' diagram and this diagram remain for White. Either that, or I have missed something.
If I have missed something, it seems that
This shows the follow-up from the previous diagram. White is locked up in the corner, but the marked stone still has quite some aji. Exchanging White a for Black b would decrease this aji. -- Andre Engels
I like Andre's
Remembering that the premise behind the 3-3 invasion is that Black has already played on the outside, can White afford to fight hard here or not? Black a now leaves White without two eyes.
Therefore, after
How about
The "only" continuation would be
As found through Jansteen's GoBase. Which means my "new" move isn't a new move after all. Hm... Should I be happy or sad? GoranSiska dnerra: Be happy, Goran! :) I have another option to discuss:
Could this be good enough sometimes? White is more confined than usual, but Black will have to add one more stone to take (Anyway, Goran's move at a definitely looks more stylish!:)
Phlegmatic If the ladder works for White, this surely makes Charles The cut is considered a trick play. It has been seen in pro play, though. It was discussed in an old Go World (reference, someone?).
DJ: Well, yes, I happen to have that Go World: n. 19, June 1980; this move is discussed to some extent, as it was played by Otake (then Meijin) against Sato Masaharu (then 7 dan), in the quarter-final of the third stage of the 4th Kisei.
A very good suggestion. The value of a sacrifice depends on the wholeboard position. When Black takes the stone, his shape is much stronger (naturally ). Black a threatens the corner with ko while White a ends in gote. Therefore Black will most likely get to play a in sente.
In this diagram
Depending on outside strength Black may play It's quite surprising how quickly the whole board considerations come into play. Path: InvasionItinerary · Prev: BlockOnTheWiderSide · Next: 4463Enclosure33Invasion This is a copy of the living page "4-4 point 3-3 invasion joseki, hane inside cut" at Sensei's Library. ![]() |