The modern move  

This choice of is a relatively modern move, which became quite popular from the late 1980s onward. The aim of the move is to keep sente. In professional play, a has been the common response. Since the advent of strong bots, has been the usual move in the invasion patterns, and b is the most common response.

Table of contents Main line: bump White's continuation after black tenuki The attachment Fighting variations Inside cut Outside cut Pulling back See also

Table of diagrams The modern move Black can tenuki Extension Double hane to keep sente Inside hane resisting W5 @ BB Inside and outside hane Going for the left side Securing the group A fight White attaches Extend Alternative move order White's hane Fight White has the ladder If black has the ladder Continuation Continuation 2 Hiki Continuation

Main line: bump

Black can tenuki  

After the -- exchange, Black can play away, if the board is mostly empty, to be the first to play in an either empty or 1 stone corner.

The price for playing away is that White can play a. Black remains with a wall without extension. AI bots have evaluated this as playable for Black.

If Black continues here, he should do so at a, b or c. The simplest move is a, but c is most common in professional play.

Extension  

builds a wall, but it has the disadvantage of giving up sente. White can try to peep at a, but she has to reckon with the possibility of Black withstanding the peep with a move like b.

Double hane to keep sente  

If Black plays double hane at , he can take sente upto . Later, a ko can be fought with Black a, White b, Black . White can stop this by playing c herself.

Inside hane  

With the inside hanes at and , Black forces White into the corner, but loses sente. ( can also strongly connect at a). White can play elsewhere

resisting @  

White can resist like this. She gets out in sente with , but Black makes a lot of profit and gets central influence.

Inside and outside hane  

Using the inside and outside hane, Black locks white into the corner from both sides.

Going for the left side  

If Black doesn't mind giving up the top, he can go all out for the left side by playing in the previous diagram at here.

White's continuation after black tenuki

Securing the group  

If Black plays tenuki, White has two main ways to continue, one peaceful, one fighting. This shows the peaceful variation, where White secures the corner territory and a connection to the outside while weakening Black's wall. Black however has sente again.

A fight  

Playing atari on the other side with leads to a fight upto . The moves shown here are a common continuation, but as usual in fighting joseki there is a lot of room for variation, and the fight is only beginning.

White attaches  

After , black can try any of a-d. Black a leads to the variations at 44Point33InvasionExtension, whereas b reverts to the "hane-stretch" variations at 44Point33InvasionJoseki.

Extend  

Black c leads to this variation, in which black loses sente. However, black can sometimes tenuki after .

Alternative move order  

In recent professional games, white plays before , making it harder to tenuki.

White's hane  

In pre-AI games (2016 and earlier), white would often play hane and connect with before pushing down the side. Black can sometimes tenuki after .

Fight  

More often, is played as hane, starting a fight. After , white will usually cut at a or b, although c is also seen occasionally.

Inside cut

White has the ladder  

This relies on a ladder -- but for parallel fuseki, the ladder will normally be in white's favour. is a key point of this shape. After , black can continue at a or b, and a complicated fight will follow.

If black has the ladder  

If white's ladder at a is broken, then white collapses. Instead of cutting at , white has to give way by playing .

Outside cut

Continuation 2  

Black can continue the fight with any of a through d

Hiki  

Instead of fighting with at , white can try this more peaceful continuation. After , Black will try to hem White in in the corner, but White can still decide to fight by playing here instead of

Continuation  

This diagram shows one possible continuation.

Chris Hayashida: There looks like there's a problem with the continuation. Black will just extend from and capture three stones. Is Black supposed to play an atari first?

See also

This video by Yeonwoo.