4-4 Point 3-3 Invasion, Territorial Double Hane Joseki

PageType: Path   Difficulty: Intermediate   Keywords: Joseki

Return to parent joseki article: 4-4 Point 3-3 Invasion, Double Hane, Atari Up, Capture

The 4-4 point 3-3 invasion, territorial double hane joseki is the settled position of a popular 3-3 invasion joseki.

This variation has proved very popular with AIs such as LeelaZero and Minigo during a certain phase of their training; the AI community took to calling it the flower joseki, alluding to the resulting ponnuki, as noted in [ext] this forum topic.

Table of contents

Quick Navigation

Moves are listed by frequency in professional games[1], which is sensitive to whole-board position. Bolded moves are commonly considered joseki.

White Continuations  
Black Continuations  

Overview of White Continuations

Subsequent moves  

Subsequently, W1 may become a big point, igniting a pushing battle by threatening the hane at a. For this reason, W1 at W3 would be slack. Typically Black responds at B2 if he chooses not to ignore W1, and up to B6 is a common sequence. Note that if Black plays B4 at W5, then Black loses the corner: see the next diagram.

Double hane  

Black would probably like to play the double hane of B1 in this diagram, but here the aji of the marked white stones come into play. White can retake the corner -- or worse.

Two step hane  

This side stepping by Black does not really produce a good result, leaving weaknesses at a and b in gote. This is especially as Black usually chooses this joseki (two step hane after the 3-3 invasion) when a wall facing the top side is not very valuable, opting instead to take points in the corner.

Corner aji (1)  

If White gets the marked stone in place, W1 will either link up as in the diagram or capture the marked black stones.

Corner aji (2)  

The other aji is that W1 and W3 threaten to extract the marked stones in the same way as above, so that W1 becomes almost absolute sente. This in itself is not so bad, but it could be a minus if Black's reason for not following the standard sequence was that the top side is not interesting. According to GoBase, Black's responses to W3 include a, b and c. If Black has a suitable extension on the right side, Black can also respond at d.

Overview of Black Continuations

Black move  

If White chooses to tenuki, Black may choose to exchange B1 with W2. Subsequently, Black may hane at a, but in professional games Black is also seen to tenuki after the exchange (simply to prevent White from getting W1).

Building influence  

If Black wants to build up the upper side, he can play B1 immediately.

Black attack  

If Black has support on the left side, say black+circle, then Black may elect to attack at B1. In professional games, W2 is seen replying at either a or b.

Note that without the support of stones such as black+circle, a Black move at B1 is very likely to end up being a misplaced stone.


The Presence of Other Stones


After the variation "taking the corner" White will most likely continue with these moves. In most cases, when White invades at the 3-3 point, Black has stones on both sides, at or around the places shown here. Black's left side stone has lost much of its value after this sequence.


  • [1] Frequency statistics were obtained from [ext] Waltheri's Go Pattern Search using the full database restrained to a local search (accessed September 2022).

4-4 Point 3-3 Invasion, Territorial Double Hane Joseki last edited by yuzukitea on September 10, 2022 - 20:51
RecentChanges · StartingPoints · About
Edit page ·Search · Related · Page info · Latest diff
[Welcome to Sensei's Library!]
Search position
Page history
Latest page diff
Partner sites:
Go Teaching Ladder
Login / Prefs
Sensei's Library