3-4 point low approach one-space low pincer one-point jump

One-point jump  

Jumping out with is the most common answer to the tight pincer .

The answer at a is the standard play here. At b is the only real alternative: it is steady, and Black can hope then to develop on both sides.

Standard play and main line

[1]

Up onto the fourth line  

To answer with shows consistent, natural aggression. White has to find some way to deal with this play other than pushing at the circled point ^[5].
The two major answers for White, at c and at d, have varied in popularity over recent decades. To play at d usually allows Black to take sente. On the other hand to play at c can mean large-scale fighting. Just recently the pros have been preferring c.

[2]

Inducing play  

After , starting a new group, is just about forced. Then is expected. is an inducing move, setting up . It also obstructs a black extension along the left side.

Main line  

Next - is the main line continuation. Black may instead try at e, to trade away the pincer stone.

Continuations  

After that, White has a choice of way to play: at the square-marked point to fight on the left side, or at one of the circle-marked points to attack on the upper side.

There are many variations on the way to this position, though.

Standard play, variations

[3]

A modern line  

The variation with these days is followed by -. Black will play at once, but can leave follow-up moves here for a little while.

Black takes territory and sente. White was playing this way 15 years ago; but now the line above is seen again.

Alternatively White can descend:

A modern line  

See BQM291

Developing on both sides

[4]

Steady for Black  

If on the third line instead, White can settle easily with well-timed kikashi , and .

This allows , developing on both sides. Black has quite a low position, though: this isn't suitable in the context of a large-scale plan.

Fourth line territory

[5]

 

Forcing Black to crawl along the line of victory, while pushing the cart from behind, is considered a basic mistake for White (see fourth line, fifth line and pushing from behind). Strong players consider such plays only in exceptional circumstances.

Incidentally, when White pincers the original pincer stone around f, that stone can be considered kikashi, as it has already produced profit in the form of the fourth line territory, so that it can be sacrificed in the most profitable way.