Malkovich 104 - Joaz vs Chew Terr

Loons · Post by **Loons** » Wed Mar 16, 2011 3:03 pm

emerus · Post by **emerus** » Wed Mar 16, 2011 6:54 pm

cdybeijing · Post by **cdybeijing** » Wed Mar 16, 2011 7:17 pm

Very much looking forward to following this game, so I hope both players will play their best.

Post by **Joaz Banbeck** » Wed Mar 16, 2011 10:23 pm

Chew Terr wrote:...I fully expect to die in a fire..

As I replied in our pre-game PMs, proper manners require that I not disappoint my opponent.

Click Here To Show Diagram Code: [go]$$Wc Prisoner Count: B-0 W-0 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . 3 . . . . . . . . . | $$ | . . . X . . . . . , . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . X . . . . . , . . . . O , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Beginner notes on direction of play:

Click Here To Show Diagram Code: [go]$$Wc The direction of play from the corner stones $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . X . . . . . , . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ --------------------------------------- $$ { AR D5 D7 } $$ { AR E4 G4 } $$ { AR P4 N4 } $$ { AR Q5 Q7 }[/go]

Click Here To Show Diagram Code: [go]$$Wc An important side according to Yang. $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . X . . . . . , . . . . . X . . . | $$ | . . . . . . . . . 1 . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Click Here To Show Diagram Code: [go]$$Wc The direction of play from the corner stones $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . , . . . . . , X . . | $$ | . . . . . . . . . . . . . . X . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ --------------------------------------- $$ { AR D5 D7 } $$ { AR E4 G4 } $$ { AR Q5 Q7 }[/go]

Click Here To Show Diagram Code: [go]$$Wc A semi-important side according to Yang $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . , . . . . . , X . . | $$ | . . . . . . . . . 1 . . . . X . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Click Here To Show Diagram Code: [go]$$Wc The direction of play from the corner stones $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , X . . | $$ | . . X . . . . . . . . . . . X . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ --------------------------------------- $$ { AR Q5 Q7 }[/go]

Click Here To Show Diagram Code: [go]$$Wc A relatively unimportant side. $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , X . . | $$ | . . X . . . . . . 1 . . . . X . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Due to the constraints of this game, I can't go looking in the book right now, but there was a bit more than that. I just don't recall what. And I may have the numbering slightly off - there were sub-classes - but the order is correct.

The first two plays of this game were first class moves - we took empty corners.

The next possibilities are second class moves: completing my shimari or taking a side:

Click Here To Show Diagram Code: [go]$$Wc Prisoner Count: B-0 W-0 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . a . . . . . . . . . | $$ | . . . 2 . . . . . , . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . b . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . X . . . . . , . . . . O , d . . | $$ | . . . . . . . . . c . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Note that the right side is not considered because it has only one adjacent corner with a stone/group aimed in its direction. ( The current direction of the 5-4 is westward. It will change to northward if I complete the shimari )

I'm choosing 'a' because I get the best balance. Move 'd' keeps all of my stones in one corner of the board, as does 'c', almost. Moves 'a' and 'b' are almost equal in that respect, with 'a' winning over 'b' by an angstrom.

Horibe · Post by **Horibe** » Thu Mar 17, 2011 6:24 am

Website · Post by **Chew Terr** » Thu Mar 17, 2011 7:33 am

Click Here To Show Diagram Code: [go]$$Wc Prisoner Count: B-0 W-0 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . O . . . . . . . . . | $$ | . . . X . . . . . , . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 4 . . | $$ | . . . X . . . . . , . . . . O , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Loons · Post by **Loons** » Thu Mar 17, 2011 12:47 pm

@Horibe (and I guess, topazg)

@No-one

@Chew

Website · Post by **Chew Terr** » Thu Mar 17, 2011 12:51 pm

@Loons:

topazg · Post by **topazg** » Thu Mar 17, 2011 12:59 pm

@Loons:

Yeah, I think Kajiwara has flavoured his comments too, and rightly so IMHO

One slight shortcoming in Joaz' explanations, from my perspective, is that a 4-4 is not synonymous with a shimari in the direction they both want. The urgency of the development on the right, in the diagram below, is bigger than on the left, even though both bottom corners "want" their respective areas developed:

Click Here To Show Diagram Code: [go]$$Wc Prisoner Count: B-0 W-0 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . X . . . . . , . . . . . , X . . | $$ | . . . . . . . . . . . . . . X . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ --------------------------------------- $$ { AR D5 D7 } $$ { AR Q5 Q10 }[/go]

EdLee · Post by **EdLee** » Thu Mar 17, 2011 3:52 pm

Chew Terr:

Post by **Joaz Banbeck** » Thu Mar 17, 2011 7:04 pm

Click Here To Show Diagram Code: [go]$$Wc Prisoner Count: B-0 W-0 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . O . . . . . . . . . | $$ | . . . X . . . . . , . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 4 . . | $$ | . . . X . . . . . , . . . . O , . . . | $$ | . . . . . . . . . . . . . . . . 5 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

comments later...

Website · Post by **Chew Terr** » Thu Mar 17, 2011 9:10 pm

Click Here To Show Diagram Code: [go]$$Wc Prisoner Count: B-0 W-0 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . O . . . . . . . . . | $$ | . . . X . . . . . , . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 6 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . X . . | $$ | . . . X . . . . . , . . . . O , . . . | $$ | . . . . . . . . . . . . . . . . O . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Click Here To Show Diagram Code: [go]$$Wc Prisoner Count: B-0 W-0 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . O . . . . . . . . . | $$ | . . . X . . . . . , . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 6 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . x y . . | $$ | . . . . . . . . . . . . . . . . X . . | $$ | . . . X . . . . . , . . . . O , . . . | $$ | . . . . . 7 . . . z . . . . . . O . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

I considered playing one point higher than this, but solid is good. I'm going to try to keep solid. I expect my opponent will jump towards the bottom left, possibly after trading 'x' for 'y'. This would be good for him, but it's better than letting my approach stone get attacked, so I'm mostly okay with it for now. Alternatively, he could jump somewhere like 'z', which seems a bit slow, especially for a handicap game.

Post by **Joaz Banbeck** » Fri Mar 18, 2011 12:14 am

Joaz Banbeck wrote:...
comments later...

Comments on move 5:

I believe that my honorable opponent has made a slight mis-step on move #4.

The most common approaches to a 5-4 are the 3-4 and 3-3 invasions ( noted with 'a' and 'b' below ). The 5-3 approach is generally regarded as special purpose move, used only for the rare occasion in which the side is worth more than the corner. In this instance, given that there is only one other stone on the side ( at Q 16 ), the side is not worth more.

Click Here To Show Diagram Code: [go]$$Wc Prisoner Count: B-0 W-0 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . O . . . . . . . . . | $$ | . . . X . . . . . , . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 4 . . | $$ | . . . X . . . . . , . . . . O , a . . | $$ | . . . . . . . . . . . . . . . . b . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

I clearly cannot let black continue from his approach and have the corner like this:

Click Here To Show Diagram Code: [go]$$Wc White is eyeless and floating $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 4 . . | $$ | . . . X . . . . . , . . . . O , . . . | $$ | . . . . . . . . . . . . . . . 6 . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

So the obvious answer for me is to take the 3-3 point for myself:

Click Here To Show Diagram Code: [go]$$Wc White gets the corner $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 4 . . | $$ | . . . X . . . . . , . . . . O , . . . | $$ | . . . . . . . . . . . . . . . . 5 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

This not only gets a small corner for me, but it threatens to attack his stone with a pincer:

Click Here To Show Diagram Code: [go]$$Wc $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 7 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 4 . . | $$ | . . . X . . . . . , . . . . O , . . . | $$ | . . . . . . . . . . . . . . . . 5 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

...or shoulder hit:

Click Here To Show Diagram Code: [go]$$Wc $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . 7 . . . | $$ | . . . . . . . . . . . . . . . . 4 . . | $$ | . . . X . . . . . , . . . . O , . . . | $$ | . . . . . . . . . . . . . . . . 5 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

So I will not only get territory, I'll probably get sente when he defends.
There is only one reasonable way to defend:

Click Here To Show Diagram Code: [go]$$Wc The simple 2-space jump $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 6 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 4 . . | $$ | . . . X . . . . . , . . . . O , . . . | $$ | . . . . . . . . . . . . . . . . 5 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

The slide underneath is just too small:

Click Here To Show Diagram Code: [go]$$Wc Black gets maybe two points, \n white gets more than that and a solid base\n ...and sente $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 4 . . | $$ | . . . X . . . . . , . . . . O , . 8 . | $$ | . . . . . . . . . . . . . . . . 5 6 . | $$ | . . . . . . . . . . . . . . . 9 . 7 . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

====================================================

Another way of looking at this involves tewari analysis ( see http://senseis.xmp.net/?Tewari ) If we consider the same position, but pretend that it was arrived at by a different sequence, we sometimes can gain additional insight.

Let's look at it like this:

Click Here To Show Diagram Code: [go]$$Wc Same stones, different order of placement $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 4 . . | $$ | . . . X . . . . . , . . . . 5 , . . . | $$ | . . . . . . . . . . . . . . . . 3 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Here we have a white 3-3 stone alone in a corner, and black makes a 5-3 approach. This is rather odd, making a low approach to a low stone. The 3-3 stone is the king of low stones, being low with respect to two sides, and any low stone attempting to contest it in 'lowness' will come in second.

The primary weakness that 3-3 stone has is that it lacks influence, so the common approaches are high, at the circled spots:

Click Here To Show Diagram Code: [go]$$Wc Three high approaches, on biased to one side, one to the other,\n and one squatting directly on top. $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . C . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . X . . . . . , . . . C . C . . . | $$ | . . . . . . . . . . . . . . . . 3 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

This is usually the most reasonable approach - to take what the 3-3 stone has left easily available.

Again, in this joseki, the 3-5 is a special purpose play, used when the side is worth more than the corner. And again, in this game, it looks odd because the side is not bigger.

=========================================================================

In summary: He played toward the side too much, so I'll take the corner. Net result is better for me.

Post by **Joaz Banbeck** » Fri Mar 18, 2011 1:59 pm

Comments on my next move - for observers:

On the right side of the board, his group is semi-weak. I have several possible plays against it. Move 'a' is a good large-scale attack; 'b' and or 'c' are nice for squashing it down - and very useful for territory if I should find myself with strength in the lower middle around 'x'; and 'd' or 'e' may be convenient if by some misfortune I should happen to need to cower in the corner to stay alive.

Click Here To Show Diagram Code: [go]$$Wc Prisoner Count: B-0 W-0 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . O . . . . . . . . . | $$ | . . . X . . . . . , . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , a . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 6 . . | $$ | . . . . . . . . . . . . . . . b . . . | $$ | . . . . . . . . . . . . . . . c . . . | $$ | . . . . . . . . . . . . . . . . X d . | $$ | . . . X . . . x . , . . . . O , . e . | $$ | . . . . . . . . . . . . . . . . O . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

The unfortunate thing about any of those 3 strategies is that they are all mutual aji-keshi: that is, playing any one of them induces a response from him that them pretty much removes the effectiveness of the other two. Since most of the board is still wide open, I don't yet know which one I will want, so it is too early for me to choose.

Before concluding the issue, I must ask if it is early enough for him to choose. Can he profitably remove any or all of the possiblities before I am able to make an informed choice? Might I be faced with the necessity of playing one of them right now to prevent him from taking it himself?

Click Here To Show Diagram Code: [go]$$Wc Prisoner Count: B-0 W-0 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . O . . . . . . . . . | $$ | . . . X . . . . . , . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . C . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 8 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , C . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 6 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . X . . | $$ | . . . X . . . x . , . . . . O , . . . | $$ | . . . . . . . . . . . . . . . . O . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

First, he can stry something around 'a' himself. But this looks small and over concentrated on one side. No matter where he plays - such as :b8:

above - there will always be at least one opening for me to invade. So if he can't secure the side with one move, it looks to small for him to try 'a'.

Next, he can try expanding to prevent the squashing moves of 'b' or 'c'.

Click Here To Show Diagram Code: [go]$$Wc Prisoner Count: B-0 W-0 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . O . . . . . . . . . | $$ | . . . X . . . . . , . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 6 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . 8 . . . . | $$ | . . . . . . . . . . . . . . . . X . . | $$ | . . . X . . . x . , . . 9 . O , . . . | $$ | . . . . . . . . . . . . . . . . O . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Again, such a move looks overconcentrated, and when I reply with :w9:

, I appear to have gotten more than he.

Last, he can slide into the corner, to prevent 'd' and 'e' but as noted in my previous post, I get more out of such a sequence than he does.

So, in conclusion, it is too early for me, and too early for him. I see no urgency - nor even a big move - on the right side.

More thoughts about other portions of the board will appear later...

Post by **Joaz Banbeck** » Fri Mar 18, 2011 3:32 pm

Further comments for beginners:

About the choice of play on the left:

If the play in the center were to go as shown with the circled stones:

Click Here To Show Diagram Code: [go]$$Wc $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . O . . . . . . . . . | $$ | . . . X . . . . . , . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , 1 . . | $$ | . . . . . . . . . . . . 5 . 3 . . . . | $$ | . . . . . . . . . 9 . 7 . . . . X . . | $$ | . . . . . . . . . . 6 8 4 . 2 . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . X . . | $$ | . . . X . . W W W W W W . . O , . . . | $$ | . . . . . . B B B B B B . . . . O . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

...then an attack like :w1:

fits. ( It is generally a good idea to push your victims against a wall if you have one, using it like an anvil. )

But trying to use two perpendicular walls to make territory is inefficient:

Click Here To Show Diagram Code: [go]$$Wc Prisoner Count: B-0 W-0 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . O . . . . . . . . . | $$ | . . . X . . . . . , . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . 5 . . . . . 4 . . | $$ | . . . . . . . . . . . . 6 . . . X . . | $$ | . . . . . . . . . . . . . . . 3 . . . | $$ | . . . . . . . . . . . . . . . 1 2 . . | $$ | . . . . . . . . . . . . . . . . X . . | $$ | . . . X . . W W W W W W . . O , . . . | $$ | . . . . . . B B B B B B . . . . O . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

...and the putative territory can be easily invaded.

However, if the lower center turned out like this:

Click Here To Show Diagram Code: [go]$$Wc Prisoner Count: B-0 W-0 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . O . . . . . . . . . | $$ | . . . X . . . . . , . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . 7 , . . . | $$ | . . . . . . . . . . . . . . . . 6 . . | $$ | . . . . . . . . . . . . . . . 5 X . . | $$ | . . . . . . . . . . 9 . . . . 3 4 . . | $$ | . . B . . . . . . . . 8 . . . 1 2 . . | $$ | . . . . . . . . W . . . . . . . X . . | $$ | . . . X . . . . . , . . . . O , . . . | $$ | . . . . . . B . W . . . . . . . O . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Now making territory looks possible because invaders can be crushed against the newly created wall.

Note: these schemes are somewhat idealized, so there may be possible sequences that do work contrary to what I have said. Nonetheless, the idea here is to illustrate the general themes that arise from one type of resolution of the lower middle vs another type, and why the decisions on the left must wait.

Life In 19x19

Malkovich 104 - Joaz vs Chew Terr

Re: Malkovich 104 - Joaz vs Chew Terr

Re: Malkovich 104 - Joaz vs Chew Terr

Re: Malkovich 104 - Joaz vs Chew Terr

Re: Malkovich 104 - Joaz vs Chew Terr

Re: Malkovich 104 - Joaz vs Chew Terr

Re: Malkovich 104 - Joaz vs Chew Terr

Re: Malkovich 104 - Joaz vs Chew Terr

Re: Malkovich 104 - Joaz vs Chew Terr

Re: Malkovich 104 - Joaz vs Chew Terr

Re: Malkovich 104 - Joaz vs Chew Terr

Re: Malkovich 104 - Joaz vs Chew Terr

Re: Malkovich 104 - Joaz vs Chew Terr

Re: Malkovich 104 - Joaz vs Chew Terr

Re: Malkovich 104 - Joaz vs Chew Terr