23 Dec 2009 3 Comments

Joseki of the week 12

Joseki of the week 12 looks at the 5-5 point, attach and draw-back/connect joseki.

White plays a 3-4 inside approach, black attaches outside, white hanes underneath
The result appears similar to joseki of the week 11.

Diagram 1.

After white 4, black can also play at a instead of at 5 in diagram 1.
White 6 is preferred instead of a, since when black cuts, the black corner territory is larger than the similar result in joseki of the week 11.

Diagram 1.

After black 3, white can take sente, having a successfully undermined blacks corner territory, but leaving black with a wall facing down the left side.
White cannot cut at a, and black can later jump at b, so the wall is fairly thick.

If there are any questions about the joseki of the week,
or if they are too basic/under-examined/complex, let us know in the comments!

by matjet in Analysis, Joseki of the Week

15 Dec 2009 No Comments

Joseki of the week 11

Joseki of the week 11 looks at the 5-4 point, outside-attach and draw back joseki.
(takamoku-tsuke-hiki)
White plays a 3-4 inside approach, black plays the outside contact, white hanes under and black pulls back to 5 in Dia 1.

Diagram 1.

White 4 above is forced. White can play either a or b next.

Diagram 2. – - – - – - – - – - – - – - – - – Diagram 3.

White 1 in diagrams 2-3 allows black to cut on either side.
White gains extra thickness from the ponnuki in both cases.
In diagram 2, white continues with 7 at a or b.
In diagram 3, where black aims for outside influence, white can continue with a or tenuki.

diagram 4.

If white plays tenuki at the end of diagram 3, then black can play 1 and 3 in diagram 4.
However even if white plays tenuki a second time, the corner is still a ko at a.

Diagram 5.

white plays 1 above to ensure access to both corner and top side of the board.
Black no longer has the option to choose whether to take the corner, or influence on the top side.
However, white has a lower position than if white played as in diagram 2.

If there are any questions about the joseki of the week,
or if they are too basic/under-examined/complex, let us know in the comments!

by matjet in Analysis, Joseki of the Week

03 Dec 2009 2 Comments

Joseki of the week 10

This week is a continuation of joseki of the week 4.
It was a 4-4 point, low approach joseki where black plays a tsuke above white with 3.

White normally plays 4(d13) after black 3(d14), but c(d15), d(c17) or tenuki may be possible. These will not be looked at here however.

In joseki of the week 4, black a(e14) next was looked at. This week black 5 at b(c15) is considered.

Black can either tenuk or play around a(k17) now.

White can either play at a(c17), black b(d17) then white c(b16) to take some of the corner, or d(b15) to gain sente.
Black plays b in response to a, since white can live in the corner otherwise.
Black replies to d(b15) with ac17(), since playing at c(b16) will result in bad shape and bad aji in the corner.

Black can also play this way. Now black has a secure corner and sente, but the white group is solid and has greater influence.

If there are any questions about the joseki of the week,
or if they are too basic/under-examined/complex, let us know in the comments!

by matjet in Analysis, Joseki of the Week